How to reset ecu?

I missed the boat, did all sorts of mods (timing, header, cai) and noticed small improvements w/ each. Now I read I need to reset the ecu to take full advantage of the changes. SO....uh? how do I do that exactly?

Disconnect the negative bat terminal. I let mine sit over night. Then plug it back up voila, reset ECU!

Uh...thanks I think I can handle that kind of technical repair on my own.
Thanks, Cheers , and happy Mem. Day