How to blunder less in chess?

Recently i have been blundering a lot in OTB games, this has never happen to me before, help?

Sleep at least 8 hours a day. I always tilt the day after I stay up reading manga up to 3 am.

What has changed recently for you?

I am not concentration enough talking trash to much making blundering moves

None of the above. All players of rating 1600 blunder left and right. Why should you be any different? If you didn’t blunder you’d be 1800. You might be also suffering from adult blunder syndrome.

I wish I had abs

Take heart...International Grand Masters blunder...There are numerous examples. I recall seeing some games that world champions blundered. Loss of focus is my biggest blunder maker...like thinking of other things during the game. Failure to recognize the threat of my opponents previous move, while concentrating to much on what I want to do. When you think you have found your move … sit on your hands and look again. :]

Take time to think.
When you see a good move, wait, do not play it, you might find a better one.
After you have decided on a move, pause and check it is no blunder.

drinking alcohol or smoking too much bud...........

@chess_king3 I had some similar problems lately. I have blundered away two pawns and an exchange in my first 8 moves of an OTB league game. I had enough sleep, no alc, no smoke. I normally do no such simple blunders in long OTB games.

I have the suspicion that it is caused by doing too much tactics training. In tactics training, you mostly need not to look too much at your own hanging pieces. You only look at your attacking possibilities.

So you untrain looking for your opponent's threats.