One is only really inwardly comfortable, so to speak, after one's life has assumed some sort of shape. Not just a routine, like studying or a job or being a housewife, but something more complete than all those, which would include goals set by oneself and a circle of life-time type friends. I think this is one of the hardest things to achieve, in fact often just trying doesn't achieve it but rather it seems to develop almost by accident.