Open Ports For Gaming!!!

Which Ports Do i Open so I won't have lag playing games. B/C I dl stuff while playing games, but i heard that if I open the right ports, it wont lag when I play games. So which ports do i have to open, be as specific as possible. I already know how to open up the router menu from the Explorer, but I need to know what to do after.

And this thread should be a sticky, to those who wants to have a smooth connetion while playing games

 

i may be wrong but opening ports while you are playing games will not help your ping or lagging. it will only increase your vulnerability to be hacked. not downloading stuff while you game will better lag by to ways, first it frees up bandwidth (modem speed), 2nd it frees up processor.