function whatsyourcommand ()
{
    history | awk '{print $2}' | sort | uniq -c | sort -n | tail -23
}

this little bash function pulls some stats from your history:

   3 tar
   4 %1
   4 %2
   4 nmap
   5 rake
   5 vi
   6 irb
   7 ./t_graph.rb
   7 open
   8 dwhatsnew
   8 geheim
   9 ifconfig
  11 mysql
  14 pgoogle
  17 svn
  17 telnet
  18 syncdir
  20 ping
  29 cd
  36 j
  43 ./t_instant-instance-config.rb
  70 ls
  98 fg