Tips for my the 1st tournament

In any case, attitude is important. You want to stay motivated and positive. For some that means crush, for others it means "these are just practice games."

I really liked this article:

http://www.chess.com/article/view/responsibility-versus-apathy

I think parents are teaching kids some bad life lessons.  I see kids that slam the pieces down, say "Check!" loudly, they dont shake hands, they arent taught to win, draw, and lose with grace.  Obviously this is a small percentage, and i feel bad for these kids.  They grow up with the nike mentality that winning is all there is.

OK, here is my the first lost game. The second one tomorrow.

A lot of Masters lose when they start out. Just learn from your loss. Get a strong player to help you analyze. That guy is rated pretty high.

Don't try to be perfect.  Check for tactics, find a reasonable move and make it.  Save your time for the critical moves; that's when to really apply yourself.  If you try to make every move perfect, fatigue will kill you.

I would also add: don't block your c-pawn (e.g. with ...Nc6) in a Queen's pawn game unless you have a very good reason (Or if you're playing something like the Chigorin defence). The reason is the c5 pawn break is a very important theme in these types of positions, as well as the pawn on c6 is useful to reinforce the d5 square :)

Okay, I'm going to give some advices which are tried and true and nothing too original:

1. Pick classical openings.  The reason is openings such as the Najdorf and King's Indian are played by higher players as a certain level of complexity is needed to generate winning chances, as simpler openings will lead to equality much faster even without theory knowledge by such players. You don't need to memorize 20 moves of a poisoned pawn variation when gaps in the opponent's understanding can be exploited much simpler with 1...e5 systems.
2. The queen is the most powerful piece and queen endings have a big danger of perpetual check (though two rooks and queen vs. two rooks and queen endings are quite fun admittedly), so try getting them off the board early unless doing so gives them a positional edge or even worse.  The Berlin Defense as black and exchange Ruy Lopez as white are good openings to take up.
3. Don't concede the center at all!  Keep it overprotected to maximize your pieces' flexibility. 
4. Study rook endings, especially the Lucena position, Philidor, and short side defense.
5. Study some annotated games of Wilhelm Steinitz. 
6. To avoid early mate get queens off the board so you could get closer to an endgame where technique plays a bigger role than careless mistakes, though big problems can still arise in queenless middlegames so be careful. 
7. Keep in mind positional imbalances so you can know what to revolve a plan around then formulate candidate moves within the context of this plan.  If the opponent has a potentially dangerous plan think about prophylaxis. 

Many many thanks to all again. Also to Airut for commentation of my game. It´s megapocket of advices, I have to read them again and again to understand all.

Meanwhile, my the second lost game:

The way to avoid early mate is not to get the queens of the board unless doing so is objectively good. Also, you usually should trade queens when you are up material. Doing this will prevent you from getting practice with sharp middlegames. Note that your opponent also has great chances to mess up in these middlegames. So, playing them well will give you a big edge.

The way to avoid early mate or other blunders is to practice tactics and blunder-checking and playing more long games (and analyzing them). This way, you will also become better at punishing the opponent's blunders.

What a spammer! Is this the 10th thread you posted that in?