I know someone said a while back you can't increase your win/loss ratio using ss.
Well I found out a way you can use this method really quickly 2 win every game
(if it's allready been posted somewere else my apologies)
just set a game up of sabotage on a small map like nuke town
(I suggest a class with marathon, lightweight to get 2 the bomb quicker)
next once it starts plant the bomb
after that just wait for it to count down or if you want get a few kills on the other guy while your waiting
after it finish's you then should have a win in your stats
I found this to be the quickest as it only takes a minute 2 finish a game you will also get xp for quick victory's and stuff
hope this help's