How to avoid blunder

Hi, i'm new chess player in here. but i found myself always make pieces blunder. eg: put my unguard piece into square that has been guard (this is make me upset i always make the same errors in every games)

Is it natural to a rookie player to blunder piece and the problem will gone with more practice ? can someone give me mindset or tips to solve it ? Thanks

Practice makes perfect, maybe....

Count ALL the pawns and pieces before moving every turn. Look at every file, every rank and every diagonal before you move. (In other words examine all 64 squares FIRST instead of ignoring the ones you aren't moving from or to) Ask yourself what would your opponent do if it was their move instead of yours and you'll start noticing "hanging" pawns, pieces, back rank mates and so on. Finally ask yourself what your opponent is likely to do in response to your move (besides laugh or cry that is).  GOOD LUCK!

Haste is never more dangerous than when you feel that victory is in your grasp.  -  Eugene Znosko-Borovsky

Errors have nothing to do with luck; they are caused by time pressure, discomfort or unfamiliarilty with a position, distractions, feelings of intimidation, nervous tension, overambition, excessive caution, and dozens of other psychological factors.  -  GM Pal Benko

If a mistake or an inaccuracy occurs, there is no need to assume 'all is lost' and mope - one must reorient oneself quickly, and find a new plan to fit the new situation.  -  David Bronstein 

"When you see a good move, sit on your hands and find a better one."    Dr Lasker

Of course, errors are not good for a chess game, but errors are unavoidable and in any case, a game without ant errors, or as they say 'flawless game' is colorless.  -  GM Mikhail Tal

The winner of the game is the player who makes the next-to-last mistake.  -  GM Savielly Tartakower

Before you make a move, check ALL your opponents pieces and see if any of them can capture the square you want to move to.  Then see if moving there will leave one of your other pieces unprotected.  Then check to see if by moving to that square might lead to your opponent setting up a fork, pin, or skewer.

it is very natural to make blunders. the most blunders by rookies is because there is so many things going on on the board that you cannot see them all.
this can be avoided by taking your time to examine what is going on THE WHOLE BOARD instead of just focusing on an attack and make sure that all your pieces are protected at least ones even your pawns. yes is time consuming to start with. 

your whole focus may be aimed at certain part of the board but maybe you should have looked at king safety instead.

It's also important to understand or attempt to understand why your opponent made the last move he did.  Why did he move his knight to G5?  Could he be trying to set up a knight fork?  Those kind of things.  But don't just focus on the one piece, you have to also look for discovered attacks, too.  Did moving his knight to G5 open up an attack by his bishop on another piece?

As others have said check all the possible ways your opponent could respond after you make your move. Also play less blitz, while it is fun you do not have the proper time to really think out each move.

The best way to reduce making silly blunders is play, play, play more. Soon or later you would recognize those silly blunders and avoid making the same mistakes.

Thanks a lot for all of your thought. I'm really apreciated it. Yesterday, i study some of my game and yes i tend to hurried make my move and only calculate some square on my pursue, like overambition and fell i'm in up of wind which lead me to silly blunder, in other way when i meet an opponet which my style weaken i fear and tend to make blunder too :-)

Compare to my first week playing, this week i make a less blunder. I guess this is my homework to going on more play.

I've saved the PGN's from all my games here, and a while back I was going through some of the older ones.  I kept facepalming over some of those games asking myself "Why did you make that move?"  Every once in a while I'll find myself asking myself that over my current games.  I just think blunders are something that beginners have to live with until they learn to not make them any more.