This list by Christopher Lehman is more comprehensive than I could have thought of myself...
Think through your personal and professional life:
o the book you wanted to read
o the book you wanted to WRITE
o the song you wanted to sing
o the group you wanted to join
o the place you wanted to go
o the child you realize you have been harsh with
o the child you realize you haven’t heard from enough
o the child you wanted to congratulate
o the people you wished you had thanked
o the colleagues you do not see outside of work
o the fears you just gotta get over already
o the strengths you know you have locked inside