Play longer games. Solve puzzles where you force yourself to come up with multiple lines. Watch or play over games of stronger players where you try to guess their next move.
Stuff like that. Also play a lot of review you games for mistakes. Typically making a certain kind of mistake over and over and getting mad about it is a good way to avoid doing it again in the future 
Play longer games. Solve puzzles where you force yourself to come up with multiple lines. Watch or play over games of stronger players where you try to guess their next move.
Stuff like that. Also play a lot of review you games for mistakes. Typically making a certain kind of mistake over and over and getting mad about it is a good way to avoid doing it again in the future
awesome thanks
its been my kryptonite moving a piece to a position i see as advantageous only to get screwed by a piece i didnt know had an opening on me :/
It's a common problem (and even pros slip up from time to time).
Make sure your eyes aren't staying only on your half of the board 
Look at what the opponent can do too. The 3 types of moves you want to look for are checks, captures, and threats (like attacking an undefended piece).
errr...go outside and get out of the tunnel. No, seriously. Imo physical exercise can greatly improve your chess abilities. (not just those related to tunnel vision). This is from experience, btw, and it hasnt been completely proven, although most top players agree with my claims.
YES! I had a similar issue (and still do to some extent) what I did was play the computer at a level higher than what I was comfortable playing at, where it would punish me for missing long diagonals or missing knight moves, etc. and after each computer move would use the draw arrow mechanic to analyze all the moves the computer could make. This practice over and over helped me to analyze the whole board and also recognize threats quicker. Playing the computer is a great tool.
actually, no, playing the comp is BAD. they dont play like humans do. eg @olga-bot
Playing a strong engine in general is bad, I agree.
But I think it can be useful for what the OP is talking about, because it will punish 100% of your simple mistakes.
ya cus i can learn i just need to get this information beaten into me time and again so i think a bot would do well
I had a friend who played at a low level for a long time. All his opponents were low rated too of course, so he was only occasionally punished for doing things like leaving an attacked piece undefended.
He said it really helped him up his game when I played 1 or 2 games each day against a strong engine. The games sometimes lasted an hour, and even though he knew he was going to lose, the point was to not miss any simple tactics.
After about a month of this he had improved his calculation habits.
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help pls