Prayer is important in discerning God's will for you.
We are not required to use/develop all our talents -- but we are required to use our time to do something useful for God's glory. We must use our talents to fulfill our duty of state (convert souls and teach as a priest, support a family and raise children in the married state, etc.)
The meaning of the "Ten talents" parable is NOT pursuing every interest or every activity that you have a slight ability in.
It DOES teach us not to waste our time and/or talents on useless endeavors -- worldly amusements, laziness, etc. We must be industrious and try to do something for God's glory, using whatever God gave us -- small or great.
The parable also means that God will expect more "results" from someone with a 140 IQ than someone with a 95 IQ. And more good works/almsgiving from a man making $250,000 a year than a man making $40,000 a year.
Matthew