Yoga is nothing separate from one’s daily life and job. This is the path of karma sannyasa; renunciation through karma; work. As karma sannyasa, one lives in the external world from total harmony, making a sadhana from daily life. One does not need to escape what he is doing, but increase his awareness and develop one’s state of being while he is performing his duties. A karma sannyasa may have a family, regular job, but is not attached to either of them. In all situations, he remains in balance.
The path of karma sannyasa is explained in the fifth chapter of the Bagavad Gita, in which Krishna explains the renunciation through action. There is no harm in action, the danger lies in attachment and dependence on the fruits of the actions performed. This is essentially the concept of karma sannyasa; live life fully, participate in all events externally, but internally maintain an attitude of non-doership.
Thus, one should not think that yoga and meditation are practiced outside the office hours. Rather, they are incorporated into each activity. To at all times feel present, with remembrance of the higher essence in the background and non-affected by what happens in the foreground.
To have the mind on the higher consciousness, serve and love is one of the highest sadhanas. For those who are established on this, no other austerities are needed.
Even with a busy lifestyle, there is always time to do something. Yoga and meditation do not have to last for two hours, but ten minutes of conscious breathing is enough if there is no more time. One can find what one feels most connected with and perform at least a few mantras, asanas or pranayama. Similarly, before bed one can take ten minutes for nadi sodhana pranayama or tratak to calm the mind.