history meme onwards...
rsanheim@ares:~$ history 1000 | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
71 gst
67 l
38 ****
38 c
28 git
22 ss
21 gca
13 gsd
13 :
12 rake
I like keeping it short. The 3rd one thats bleeped out is a shortcut to my main client project right now. The aliases can be found in our open source'd etc stash on github.