Rats... beaten to it again! :-D That's a good link!

Seconded. While I heartily agree with all the comments on editors and HDD backups, my mind is my most important tool. Whenever I'm hung up, I back off and examine the attitudes that frame the context of my attention.

Be it the way I'm iterating over a file, the tool I choose to approach a task, my attitude towards that task, or how I see myself in relation to a programming team, I constantly have a background thread in my mind looking for stressed nodes that indicate improper framing.

In programming, things are just taking too long, either to run or to code. In attitude, either heat or 'tiredness' are present when there's a mental bugaboo present. In relationships with others, I look at what I call my teammates subconsciously. Are they partners or are they problems?

If your mind is clear, your code will be clear.