Plans in the Scandinavian Defence I'm playing the Scandinavian Defence with 3...Qd8 a lot and I really like that opening. But I can't seem to find the right plan. I just develop my pieces towards the center (I don't fianchetto my bishop on g7) and then hope my opponent blunders. Could you please tell me on what I can improve? I'm a 1200 FIDE rated player. 

I have already searched the web but the only thing I came up with, was that Scandinavian Defence is considered bad at high level. 

I also saw some master games but that doesn't really help as they all play 3...Qa5.
If you really must, because your friend bet a wager that he can beat you as black in this position, here are the imbalances, concrete and possible, that you must look out for (as white):
[FEN &quot;&quot;]

1.e4 d5 2. exd5 Qxd5 3. Nc3 Qd8


Black's open d-file
Active LSB
Kingside pawn majority

Still, this is not without its weaknesses:

A delay in development. White can safely continue with d4, Be3, Qd2, O-O-O.

Black's reduced control of the squares on the e-file. Castle long and prompt to push his f-pawn somehow, followed by a minority attack g2-g4 (or g2-g4-g5).

Black's reduced control of the squares on the c-file. If black castles long, or the situation somehow else warrants it, break open the c-file, create an outpost on the c4-c5 square, and move a knight, bishop, or rook to this square where b7-b6 or b7-b5 has to happen. Now you'll have a new, but weakened structure to attack.
Black will play to nullify white's knights with ...Bg4 (if Nf3), ...e6, ...Bc5, Ne7, and O-O, finally obtaining a solid position. If white castles short, black can launch a minority attack, creating holes which his knights can then infiltrate. He can place pressure on the d-pawn by restricting its advance, playing c7-c6, ...Rd8, and ...Nd5. If white plays c4, then the d-pawn has become weakened and serves as a target.