The simplest way to "archive" old talkpage stuff is simply to delete it... you can always see the old stuff, under the 'View History' button for your talkpage.  At the moment, there are some things that you might wish to zap:  the bulky AfC notices, which we are now finished with, and some of my own bulky commentary.  -)    Feel free to declutter your talkpage as you see fit, or leave it as-is, should you prefer.  I can show you the archive-boht-tricks, if you want something more complex.