How to avoid blunders ?

+1

The question was not how to stop blundering it was how to avoid them. And, in the text the questioner immediately asks how to reduce blundering. Your answer, “Stop playing!”, while absolutely true is not helpful in any way. 

It is joke reminding us of our human side that blunders will always take place.

It's actually funny, so take your anti-humor somewhere else.

when you guys found out the answer to not blundering, could anyone also tell me how to become world champion? 

thanks in advance!

I took it as a snarky comment. But I take you at word that it was not meant that way. Humor does not always translate on the internet. And, of course you are literally correct. If I didn’t blunder I would never move a piece. 

lol

You pretend you have a tiny drone that hovers over the opponents pieces one by one to see what they are doing and where they are looking - every piece - every angle

use Komodo

Don't make a move. 

I actually suggest sitting on your hands (even if it hurts!) it works for me because it prevents rash moves.

It is a matter of mental discipline. Think about your move. After you have selected your move and before you play it always check it is no blunder.

https://chessmood.com/blog/how-to-handle-painful-blunders

Thanks for the article

This may be a bit convoluted, but try doing tactical puzzles with the board reversed. Chess.com doesn't have a function for this so I often set them up on a physical board (I totally get that this takes extra time). It helps work the muscle of trying to spot tactics that the other side has and helps work against habits of only playing with your tactics in mind.

The secret to avoiding blunders is the same as avoiding getting hit by cars when you are crossing a busy road: look left, look right, check your blind spots before proceeding.

Usually it's less obvious e.g. making a less-than-optimal move which puts you at a disadvantage, or walking into a trap the opponent has set up for you, which isn't obvious until a few moves later.

Don't get pinned (queen, rook, bishop) and don't get forked (all pieces except the king). Getting forked by a pawn is quite a humiliating experience, more so than getting checkmated by a pawn.

Enable the feature that allows you to make sure about moves, then every move make sure nothing is attacking it, or if there any immediate threats to respond to

I have long since thought that tactics training in general, which seems to feature 99% attacking tactics, does not help. It's no wonder that the average chess player looks at the board and then immediately looks for offensive tactics over checking for opponents threats.

As I described earlier elsewhere, I once analysed a seasons OTB games looking at the root cause of any losses (+ improvements for draws or wins) and I found that overlooking opponent threats was by FAR the biggest weakness in my game. So I set about to try and fix this but was puzzled to find hardly any resources on this at all. Virtually nothing. So I set about creating a course for this purpose:

https://www.chessable.com/blunder-busters/course/24065/

I don't believe that advice like 'sit on your hands' is helpful at all. I believe that you need to train this like anything else. 

It's also about gaining experience. Playing a lot of games over a period of time, especially longer games builds in blunder awareness, but it doesn't mean you can't train for this as well.