Great article. A lot of times even just the first one (Documentation) is immensely helpful. For example, one time I went through a comment-less source file ful

Great article. A lot of times even just the first one (Documentation) is immensely helpful. For example, one time I went through a comment-less source file full of mathematical formulas and replaced magic numbers with meaningful constants and documented which RF chipset datasheet each formula/constant was coming from (including page number). Other developers thanked me later when they were looking for the same thing.