This applies to trying to do too much in non-working hours as well as conflict between the two. I feel I'm at 5 and have been for a while in terms of not having time for everything I've decided to do (particularly the things I've told others I will do) and I'm too belligerent to let things drop. I perhaps must do something about this!
The trick is to become more and more resentful about how you are being used until that feeling is stronger than the stubbornness that won't let things drop. ;)
One of my key issues is being (sorry for the technical medical terminology here) a bit of a manic depressive fuckwit. Manic me gets big ideas & plans things, and being all excitable he tells everyone about said intentions so that the rest of me then feels the need to find a way of making happen! I do it to myself more than there being other people to be resentful of.