Improvement

Dear friends and Mr. Lance5500,
Hi, my name is MonsterMayhem; I've been playing chess for a while but recently got stuck in a pothole. Now I can't improve and I'm losing! Before I was above 1800 and now I'm stuck around the 1700-1675 border. What should I do to improve? Thank you.

play classical games and think over long term moves before you you play a move,

This. Playing classical and taking a break from blitz is magical for rating improvement.

I had something like this just keep playing and you will find it sorts itself out

I want someone to play correspondence games with me for my improvement.