How to improve performance. Global draw, fps override, jpeg/raw, etc.

[togg]

I haven't found a topic about this. It would be wonderful to have a list of tips to make performance better for slow cards.
I've already understand that turn global draw off will help, but how much mb/s will it bring?
And what about fps override and the jpeg/raw settings? How should I set them?
What else do you do to improve stability? Do you start a little recording first to warm up the card?