I am sure we have all been in the situation where we’ve learned a new piece of software and only a couple of weeks later we’ve forgotten all but the basic commands. This happened to me recently when moving back to SVN after working with Git. Thankfully I have a handful of “cheat sheets” that I call upon at these times.
Here are a list of cheat sheets I find useful:
Server Side Development
Front End Development
If you know of any more please link them up in the comments.