Personally I have "knowlede base" document where are useful hints, commands and step-by-step guides how to do something (like: configure/code/export/filter etc.

Personally I have "knowlede base" document where are useful hints, commands and step-by-step guides how to do something (like: configure/code/export/filter etc.). Other text file contains useful links with other's step-by-step guide founded on internet. Github is interesting idea since it's available from my personal and working laptop. Till now i have used google docs/gmail draft messages.