Comments and `git log -p <file>` to see what the comment originally referred to is pretty useful. My personal favorite comment style is to wrap a chunk of code

Comments and `git log -p <file>` to see what the comment originally referred to is pretty useful. My personal favorite comment style is to wrap a chunk of code in `#{` `#}` blocks and add a general comment of what that chunk of code is accomplishing. Sort of like an inline method.