cc65 optimizations online: more wanted!

Hi!  I like optimizing.  In fact, I have five lists of ten optimization techniques each online.  They are at c65 additions - Manage Files at SourceForge.net.  If you have some good ideas to add to them, please post them here.  I'm currently working on a text adventure for the C64 and may eventually port it to the Apple2 and other 6502-based computers.