copied from Ryan Bates
Run:
rake
p <dir>
will cd to your Projects directory
Tab completion is also added to rake and cap commands:
rake db:mi<tab>
cap de<tab>
To speed things up, the results are cached in local .rake_tasks~ and .cap_tasks~. It is smart enough to expire the cache automatically in most cases, but you can simply remove the files to flush the cache.
There are a few key bindings set. Many of these require option to be set as the meta key. Option-left/right arrow will move cursor by word, and control-left/right will move to beginning and end of line. Control-option-N will open a new tab with the current directory under Mac OS X Terminal.
If there are some shell configuration settings which you want secure or specific to one system, place it into a ~/.localrc file. This will be loaded automatically if it exists.