wow i had to read this twice.What about having pics on blank pages of your browser of your most visited sites which are links to those sites?
i usually type, for exampe "sp" in the adressbar and it complets to "springrts.com"
for the sites i visit often i know after how many letters it will autocomplete to the correct one (usually 1 to 3) and can just press y, down, enter -> youtube
maybe its slower but it needs less concentration then clicking something.
Tab Mix Plus / duplicate tabs:
you can duplicate a tab by dragging the adress in the tab bar

