Code repositories. I don't care what we're using, SVN, GIT, Team whatever. It is peripheral to my job, just tell me what to use.
EMail clients too.
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When you encounter a problem, if the solution isn't readily evident go back to the start and check your assumptions.
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It’s unpleasantly like being drunk.
What’s so unpleasant about being drunk?
You ask a glass of water. -- Douglas Adams