Aaron Bertrand has provided an index to his bad habits series:
Here is an ongoing list of articles that I consider to be along these lines – either promoting best practices or eradicating bad habits; not all are explicitly framed as a “bad habit,” but they do all represent in some way things I wish I observed less often. Some of my opinions are controversial, and many have evoked very passionate comment threads – so I recommend scrolling down for those, too.
It’s a pretty long list.