If you write a lot of coffeescript and get tired of setting up your build, watch and spec tasks, grab this Cakefile and put it in your project.
curl https://raw.github.com/goatslacker/cakefile-template/master/Cakefile > Cakefile
Put all of your coffee-script in the src folder, it will compile all coffee-script in your lib folder, using the build command.
cake build
If you want to compile as you write your code, invoke the watch command.
cake watch
If you want to run your spec tests, assuming you are using vows
cake spec
cake docs
Have Fun!