It’s funny but I just realised the best way to search the stackexchange sites (stackoverflow, askubuntu etc.) is to type in a question. As you type in a title, and then the actual question it tries to suggest relevant questions. It’s always been a good feature, but I finally realised it’s actually a lot better than simply using the search button in the conventional way. I assume it must be because you type in a lot more detail when you formulate a proper question so it must have a lot more keywords it can use to do a better search for you.
The more I use those sites, the more I realise they have a lot of intelligent ideas demonstrated.