This quote is from the For the Strength of Youth pamphlet, the subject on Agency and Accountability:
"You are also responsible for developing the abilities
and talents Heavenly Father has given you. You are
accountable to Him for what you do with your abilities
and how you spend your time. Do not idle away your
time. Be willing to work hard. Choose to do many good
things of your own free will."
Before that it talks about making good choices and how we are free to choose our actions, but not free to choose the consequences.
I think the above quote goes one step further, in that we are responsible to develop our talents. Sometimes we have to try different things to discover our talents, but all talents require time and effort to make them seem effortless.