I have been working on tactics tactics tactics and just won my first game with a Queen sac.
link
[Event "Let's Play!"]
[Site "Chess.com"]
[Date "2011.12.04"]
[White "The_Shocker"]
[Black "checkmate3636"]
[Result "0-1"]
[WhiteElo "1226"]
[BlackElo "1335"]
[TimeControl "1 in 2 days"]
[Termination "checkmate3636 won by checkmate"]
1.e3 e5 2.d4 exd4 3.Qxd4 Nc6 4.Qd1 d5 5.Bb5 Nf6 6.Bxc6+ bxc6 7.c3 Bd6 8.Nf3 O-O 9.Qd3 Rb8 10.b4 Re8
11.Nd4 Rb6 12.a3 Ba6 13.Qd1 Ne4 14.f3 Qh4+ 15.g3 Qxg3+ 16.hxg3 Bxg3#
0-1
I just played good/fundamental chess and got my King castled, developed my minor pieces and put my rooks on the best files available. My plan was that after 10...Re8, move my rook to b6 and then hit the Q with my bishop, trapping the King in the middle. Whites 11. Nd4 is fine as Rb6 is now needed anyways. From there I didn't really see a way to get at the trapped King so my plan was to see what happens. 13...Ne4 seems natural and I know knights prefer advanced central squares so I played it. After 14.f3 I just checked all checks available and spotted how his King is trapped and any check will be checkmate.