Ok this is what has happened: i've started playing chess with one of my friends. I've beaten him like 2 times in a row, but then we palyed an 10 minutes game "fine with me" i said, but  i allways run out of time , im just not used to play that fast, i have to think. Twice i've lost on time, 3 times he beated me. So i asked myself...what the... how can this happen. So here i am asking u: it's blitz better than a usual 1h  game. I know this kind of  game is fun and spectacular, can it realy help you in youre chess career?

Blitz is useful practice for those times in "normal" chess when you are in time difficulties and need to make 6 or 7 quick and relatively safe moves before the flag drops. However, it is largely played on instinct and percentages, with relatively little analysis, so while exciting it rarely turns up anything original. It's like the difference between sprinting and running a marathon. In the sprint you do only one thing every time...run flat out. In a marathon strategy comes into play. You don't necessarily stay with the early leaders if you realise they're going too fast. You run to your own pace, and hopefully they run out of steam and come back to you.

Blitz is exciting because it increases exponentially the incidence of blunders. But not many blitz games find their way into chess books. In any event, you will only improve at blitz when you've played the longer game for some time, and can recognise the patterns on the board from experience. Before that you are at a disadvantage, because you find yourself analysing the blitz game as if you had ten times the thinking time, so the clock beats you every time.

The more steady chess you play, the easier blitz play becomes, and the better you get at managing time, even in a 10 minute game. However the real guts and beauty of chess is in the longer game, when players have time to think and analyse. Constant blitz at an early stage of your development will damage rather than improve your game; though having said that, you appear to have been able to beat your friend when not playing blitz, so presumably you are something more than a complete beginner; the way you played your first completed game on this site bears this out. This site is ideal for developing your game at your leisure, because you have ample time to think out your moves.

 

I think that the classical long time control chess would be the best to help you improve but the blitz chess can be useful once in a while. For example, what I like to do is play a 5 minute with 5 second increment game every so often to practice time pressure situations for when it happens in my real chess tournament games. That way I will feel more comfortable when I am down below 5 minutes in my tournament game and therefore play better.

To become better at chess you must play what is called classical chess, or as you put it, slow times. Occasional speed chess games are fine, consider them a change up to your regular routine of study and practice.