Almost every time I mention something about YSI someone says "oh, I didn't know it could do that".  This is maybe my fault for incomplete/deleted documentation, so I'm going to start writing one random snippet about YSI every day.  Hopefully these will all help you simplify your modes and improve your scripting.  I've also ported over the tips from the old YSI Secrets thread on the SA:MP forum. If you have any suggestions, questions, or your own YSI hints, feel free to share them here.

WARNING:  Don't copy and paste the examples

In order to get both indentation and syntax highlighting showing up, the "tabs" you see are actually underscores with the same colour as the background.  If you copy text verbatim from this thread, you'll come away with extra characters you don't want.