Reddit reviews Build Up Your Chess 1: The Fundamentals (Yusupov's Chess School)

For me, I think it comes down to a few main ideas:

1. Learn about other kinds of checkmate. There are a few ways to go about this. The beginning of Build Up Your Chess volume 1, by Artur Yusupov immediately starts with some basic checkmates. You can also look through the Tactical Motifs on chesstempo, and create custom problem sets using them. On https://chess.com/tactics, you can click on the 'Training Mode' icon next to the start button and select 'custom (unrated)' and then pick 'Basic Checkmates' to work specifically on a variety of basic checkmate problems as well.
   
2. Remember that, while checkmate wins the game, you can often win more easily by creating a winning position, and then playing it out. At lower ranks, a winning position might just be a game where you're up a minor piece. At mid ranks, it might be a game where you win a pawn and are able to create a passed pawn, or a game where you manage to double your opponent's pawns and blockade them successfully. Mentally getting away from the idea that the only strategy you have is 'checkmate checkmate checkmate' helps increase your awareness to other parts of the board. One of my main takeaways watching top streamer like John Bartholomew, Simon Williams, Ben Finegold etc. is that they often opportunities for winning material or creating weaknesses anywhere on the board, not just where the opponent's king is.
   
3. Sometimes you can make an attack and your opponent cannot defend. This is often referred to 'winning by force'. If you just have too many attackers and overwhelm a key square, you can just win. Usually, this isn't an option, because you and your opponent take turns. You attack, they defend, etc. In order to get ahead, you need to make moves that do multiple things at once. Sometimes this means you make a move that attacks an undefended piece AND threatens one of the basic checkmate ideas from #1. Sometimes it means you make a move that captures a defended piece (so your opponent has to recapture or lose material), and also removes that piece from defending another threatened piece. There are many other tactical ideas, and this is the core of why we practice tactics, to help spot these ideas.
   
   So, to summarize - learn basic checkmates, look for opportunities to achieve winning positions on all areas of the board, and practice tactics. Easy, right? I'll get back to you in another 10 years after I get better at it, haha.

Your fundamentals are very weak (otherwise you wouldn't be 1000) the only way to fix what's wrong with your game is to destroy the rotten foundation causing you to play bad and replace it with a solid one.

Recommended:

Reassess your Chess 4 by Jeremy Silman

Learn Chess in 40 Hours A self tutor for Beginners and Advanced Players by Rudolf Techner

The Game of Chess by Siegbert Tarrasch

Artur Yuspovs 9 books are also very,very good:

http://www.amazon.com/Build-Up-Your-Chess-Fundamentals/dp/1906552010/ref=sr_1_1?ie=UTF8&qid=1398555755&sr=8-1&keywords=artur+yusupov

May as well start doing Yusupov. Here's the intro series, it's 3 books, just like you wanted. I've always wanted to start these, and starting them at your level would actually be pretty great.

Build Up Your Chess 1: The Fundamentals (Yusupov's Chess School)

Boost Your Chess 1: The Fundamentals (Yusupov's Chess School)

Chess Evolution 1: The Fundamentals (Yusupov's Chess School)

There are then 3 more on level 2, and a final 3 for level 3.

You might try the Yusupov series.

https://www.amazon.com/Build-Up-Your-Chess-Fundamentals/dp/1906552010/ref=sr_1_1?ie=UTF8&qid=1492441854&sr=8-1&keywords=yusupov