I spend too much time on Facebook. I freely admit that. To really want to find out what all you have done on Facebook, you should look at your archive.
Getting your archive it pretty easy. Click on the little down arrow in the upper right hand corner of a Facebook page and go to settings. At the bottom of settings is 'Download a copy of your Data'. Here is the instructions from Facebook. Notice the three sections? Start at the bottom. This link will give you a large chart of what all is included in the archive. Probably a good idea to read over that.
The top link has the detailed instructions for downloading your archive. Facebook will send you a link stating that someone asked for an archive and then a second email when your archive is ready for download. Just click on the link and a .zip file will download with your Facebook life on it.