The following command, well combined commands, will give you a list of your ten most used shell commands. Just nerdy, really.
$ history|awk '{a[$2]++} END{for(i in a){printf "%5d\t%s ",a[i],i}}'|sort -rn|head
82 grep
74 svn
68 cd
53 ls
31 top20
26 emacs
22 system
17 less
14 rm
13 su
Via James
