What to Aim for in a Lifetime

Ive experienced a little for my age in the mundane sphere of life, and the more I look at spirituality I start to wonder what ine should really aim for accomplishing in an incarnation. Some have offed themselves at a certain point which Ive always found interesting. Not for mundane reasons of resentment or whatever, but just knowing that its the right time after a certain degree of attainment is achieved.