Jonathan Edwards wrote 71 resolutions to read each week he was 19. To imagine that someone at 19 would be set such a high standard for this life humbles me.
Here are a few that challenged me. (I wanted to copy and paste whole list, but if you're truly interested in being challenged, you can click the link.)
6. Resolved, to live with all my might, while I do live.
15. Resolved, never to suffer the least motions of anger towards irrational beings.
17. Resolved, that I will live so, as I shall wish I had done when I come to die.
67. Resolved, after afflictions, to inquire, what I am the better for them, what am I the better for them, and what I might have got by them.