You could bookmark/favorite the forums or threads, or or go to your profile page (up to the right where it says Welcome - just click your username and that will take you to your profile pages)
and use the statistics tab to show you all of your posts /threads..

Or subscribe to the forum topic or threads..

Our site FAQs should be helpful to explain many of those.
http://neurotalk.psychcentral.com/fa...b3_board_usage