All Work is Yoga
Every bit of work is yoga for you when you are sincere. Think that the Lord is working through your hands, eating through your mouth. In the beginning some of your actions may be unselfish. But in the long run you can do all actions in an unselfish manner.
Always scrutinise your motives. Every act can be spiritualised when the motive is pure. Work is meditation. Serve everyone with intense love, without the idea of agency, without expectation of reward or fruits.
It is selfishness that has deplorably contracted your heart. Selfishness is the bane of society. Selfishness clouds understanding. Selfishness is petty-mindedness. Pursuit of pleasure increases selfishness. Selfishness is the root cause for human sufferings. Real spiritual progress starts from selfless service. Serve the sadhus and sanyasins (holy ones), the bhaktas (devotees) and the poor and sick. Serve them with bhava, prem and bhakti (inner feeling, love and devotion).
The spirit of service must enter deeply into your very nerves and tissues. The reward is invaluable. Practise and feel the cosmic expansion and infinite ananda (bliss). Tall talk and idle gossip will not do, dear friends. Evince intense zeal and enthusiasm in work. Be fiery in the spirit of service!
Have nishta (firm devotion) with God and cheshta (activity) with hands. You will be able to do both these simultaneously - by practice. The manual work will become automatic, or intuitive. You will have two minds. One portion will be at work and three quarters of the mind will be in the service of the Lord - in kirtan, in meditation, in japa.
A raw, untrained aspirant feels, "My preceptor is treating me like a servant. He is using me for petty jobs." He who has understood the right significance of karma yoga will take every work as yogic activity or worship of the Lord. In his vision there is no menial work. In the light of karma yoga all work is sacred.
Is there a greater karma yogi than Lord Buddha? He still lives in our hearts because of the spirit of service ingrained in him. He spent his whole life serving others.