It is tough to progress if you only play bullet and blitz. To really get better you have to play longer games.
How to get past intermediate chess? (1000-1400)

Daily games significantly improve your game, but at that level tactics are also very important. pattern recognition comes with more experience.
my advice is; learn your most used openings for black and white. stick one for each and go for variations. try to learn all possible lines.

Rapid games that’s what I did. Then do 1-5 per day, if your losing a bunch take a break for a day or two.

Well, @triq, I was rated 1550 rapid just a few weeks ago and I'm climbing my way back up there again. I've won +-500 rapid games (mostly 30|0), and I've lost +-700. My opponents are generally higher rated than myself, so that's point number uno.
Second, and last for today's class, is studying the endgame. There are no shortcuts to mastery (I believe this was a theme in Naruto once upon a time). The endgame will teach you chess. You'll understand middlegame strategy much better because of it, and you'll grasp openings much better as well.
If you're interested in learning with me and friends, I invite you to join my club: https://www.chess.com/club/ah-chess . You're all invited!


^^ he has helped me a ton

Anyway, to add my opinion to the mix, I disagree with people who said youtube videos and coaches
Youtube is mostly clickbait garbage that barely has 1/100th of the instructional value of a book. It's good for very new players, but that's about it.
And a coach can give you a few tips, but almost all the improvement will be you studying the homework the coach gives you. For example homework like reading a book...
So just read a book.
Like Pachman's Modern Chess Strategy.
Youtube videos are not bad. At least some of them. Those have helped me get to 1 500, but I am sure that you are right for beyond somewhat of an intermediate level. Going through books thoroughly is surely a very good way.

I like Bartholomew's standard series as well, because he speaks about his thought process. But I am sure that books are even more effective. He said it himself: "There are more efficient ways to improve than videos."

I just checked his channel and I don't see anything like this. Can you link a specific video?

You never will. One is born into ones rating.
I, fortunately enough, was born a master.
Just beat a Danny Rensch computer level 2500 to prove it.
*Smirks in supercilious*

Improving Your Chess - Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond
Good Chess Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/good-chess-books-for-beginners-and-beyond

Improving Your Chess - Resources for Beginners and Beyond...
https://www.chess.com/blog/RussBell/improving-your-chess-resources-for-beginners-and-beyond
Good Chess Books for Beginners and Beyond...
https://www.chess.com/blog/RussBell/good-chess-books-for-beginners-and-beyond
Nope those never help. Books of a certain level may be entertaining to players of that level but they can't draw a bad player pool into a more advanced pool. One is born a master or a patzer or a Michael. Just the way it is.
Tactics are critically important for people in the rating range 100-3500! There is no level in chess where getting the calculations right isn't vital, But just solving puzzles isn't the whole answer. In your games no one will be there to whisper "it's white to play and win!" You have to learn to look and calculate. I don't think it's possible to master that playing only fast chess

Chess is playing against your own weakness. If your opening is weak, follow @gdzen's advice. And find openings with a strategy you understand and suits you. After that you're probably going to lose games on tactics, so work on recognizing discovered attacks, knight traps, overload... Analyze your games for mistakes or missed opportunities. After that you're probably want to work on your endgame, in fact the purpose of the middlegame is to trade into a favourable endgame situation. Chesswebsite has a lot of very nice videos on YouTube which might be helpful. Good luck, be patient and let us know if your rating rises a bit 😉
I'm currently rated 1250-1300, and I've been at the intermediate stages of chess for a while. I want to know what I can do to accelerate out of the intermediate stages. Are there specific books to read? Any YouTubers who help study tactics? Any recommendations would be greatly appreciated! Have a great day/night/morning!