cheat sheets.

Quick Reference for Db related tasks in Rails 3.0.0rc (as of 2010-08-25)

see: cheat rails_rake_tasks for textual description 
(or better yet: `rake -T`)

task db:migrate:reset => ["db:drop", "db:create", "db:migrate"]
task db:reset => [ 'db:drop', 'db:setup' ]
task db:setup => [ 'db:create', 'db:schema:load', 'db:seed' ]