How to improve, any book?

Hello , i am new here. I have been playing chess for over a year now, I have played around 1800 games on another site. I am around the 1600 mark, Im better at blitz than at longer games. I would like to be at the 2000 mark for the end of 2017, although i dont know if this is a smart objective. I keep playing but my rating does not seem to improve, i practise with the trainer everyday. I notice I improve, but I am not able to beat 1800 players. What would you recommend in order to achieve my 1600 to 2000 transition in this year? Do you know of any book with exercises? How many openings should I know by heart? Thanks

Thank you, I´ll have a look. With a rating of 2100 are you a NM? How does that work?

I would start with "Amateur's Mind -- Turning Chess Misconceptions into Chess Mastery" by Silman. Sounds like you have good instincts, being good at blitz -- not so good at slower games, I'm assuming your are still playing blitz when playing slower games... tactics are good, I'm guessing you might not be evaluating the position.  I think this book might open your eyes a little and help start to form better plans/strategy. 

"Pawn power" angus dunnington,, the encyclopedia of chessendings volume 1. After reading those my over the board play had 8mproved dramatically!   Youll have your hands full reading those.