Assuming that you've not remapped caps lock already to something else like control.
inoremap jj <Esc>
also, mapping the leader to spacebar is great
mapleader=" "
and finally
nnoremap Q @@
map the Q key to replay the last macro you used... much nicer than using @r or @g or whatever every time you want to replay the macro.
Your latter suggestions are brilliant, I'm going to steal them right away.