It is quite possible for you to do Sadhana at home and in the midst of your work - many do so. What is necessary in the beginning is to remember the Mother as much as possible, to concentrate on her in the heart for a time every day, if possible thinking of her as the Divine Mother, to aspire to feel her there within you, offer her your works and pray that from within she may guide and sustain you. This is a preliminary stage which often takes long, but if one goes through it with sincerity and steadfastness, the mentality begins little by little to change and a new consciousness opens in the Sadhak which begins to be aware more and more of the Mother's presence within, of her working in the nature and in the life or of some other spiritual experience which opens the gate towards realisation.

Sri Aurobindo

(Ref: Sri Aurobindo Birth Centenary Library, Vol 25, P: 161)

All the difficulties you describe are quite natural things common to most people. It is easy for one, comparatively, to remember and be conscious when one sits quiet in meditation; it is difficult when one has to be busy with work. The remembrance and consciousness in work have to come by degrees, you must not expect to have it all at once; nobody can get it all at once. It comes in two ways, - first, if one practises remembering the Mother and offering the work to her each time one does something (not all the time one is doing, but at the beginning or whenever one can remember,) then that slowly becomes easy and habitual to the nature. Secondly, by the meditation an inner consciousness begins to develop which, after a time, not at once or suddenly, becomes more and more automatically permanent. One feels this as a separate consciousness from that outer which works. At first this separate consciousness is not felt when one is working, but as soon as the work stops one feels it was there all the time watching from behind; afterwards it begins to be felt during the work itself, as if there were two parts of oneself - one watching and supporting from behind and remembering the Mother and offering to her and the other doing the work. When this happens, then to work with the true consciousness becomes more and more easy.

Sri Aurobindo

(Ref: Sri Aurobindo Birth Centenary Library, Vol. 23, P: 689-690)

When we are concentrated in mental movements or intellectual pursuits, why do we sometimes forget or lose touch with the Divine?

You lose it because your consciousness is still divided. The Divine has not settled into your mind; you are not wholly consecrated to the Divine Life. Otherwise you could concentrate to any extent upon such things and still you would have the sense of being helped and supported by the Divine.

In all pursuits, intellectual or active, your one motto should be, "Remember and Offer." Let whatever you do be done as an offering to the Divine. And this too will be an excellent discipline for you; it will prevent you from doing many foolish and useless things.

Often in the beginning of the action this can be done; but as one gets engrossed in the work, one forgets. How is one to remember?

The condition to be aimed at, the real achievement of Yoga, the final perfection and attainment, for which all else is only a preparation, is a consciousness in which it is impossible to do anything without the Divine; for then, if you are without the Divine, the very source of your action disappears; knowledge, power, all are gone. But so long as you feel that the powers you use are your own, you will not miss the Divine support.

In the beginning of the Yoga you are apt to forget the Divine very often. But by constant aspiration you increase your remembrance and you diminish the forgetfulness. But this should not be done as a severe discipline or a duty; it must be a movement of love and joy. Then very soon a stage will come when, if you do not feel the presence of the Divine at every moment and whatever you are doing, you feel at once lonely and sad and miserable.

Whenever you find that you can do something without feeling the presence of the Divine and yet be perfectly comfortable, you must understand that you are not consecrated in that part of your being. That is the way of the ordinary humanity which does not feel any need of the Divine. But for a seeker of the Divine Life it is very different. And when you have entirely realised unity with the Divine, then, if the Divine were only for a second to withdraw from you, you would simply drop dead; for the Divine is now the Life of your life, your whole existence, your single and complete support. If the Divine is not there, nothing is left.

The Mother

(Ref: Mother's Collected Works, Vol. 3, P: 25-27)

In work too there is an austerity. It consists in not having any preferences and in doing everything one does with interest. For one who wants to grow in self-perfection, there are no great or small tasks, none that are important or unimportant; all are equally useful for one who aspires for progress and self-mastery. It is said that one only does well what one is interested in doing. This is true, but it is truer still that one can learn to find interest in everything one does, even in what appear to be the most insignificant chores. The secret of this attainment lies in the urge towards self-perfection. Whatever occupation or task falls to your lot, you must do it with a will to progress; whatever one does, one must not only do it as best one can but strive to do it better and better in a constant effort for perfection. In this way everything without exception becomes interesting, from the most material chore to the most artistic and intellectual work. The scope for progress is infinite and can be applied to the smallest thing.

The Mother

(Ref: Mother's Collected Works, Vol. 12, P: 53)

I suppose it is different for each one. So each one must find those activities which increase his aspiration, his consciousness, his deeper knowledge of things, and those which, on the contrary, mechanise him and bring him back more thoroughly into a purely material relation with things.

It is difficult to make a general rule.

Truly speaking, it depends more on the way of doing a thing than on the thing itself.

You take up some work which is quite material, like cleaning the floor or dusting a room; well, it seems to me that this work can lead to a very deep consciousness if it is done with a certain feeling for perfection and progress; while other work considered of a higher kind as, for example, studies or literary and artistic work, if done with the idea of seeking fame or for the satisfaction of one's vanity or for some material gain, will not help you to progress. So this is already a kind of classification which depends more on the inner attitude than on the outer fact. But this classification can be applied to everything.

The Mother

(Ref: Mother's Collected Works, Vol 8, P: 160-161)