HOW TO PLAY STANDARD CHESS
Personally, I feel like Standard chess is the most difficult mode of chess because your opponent can actually think about the moves that they make, and you can't really use time as a last minute resort. Soooo here's the tips
1) DO NOT RUSH MOVES!!! If you're like me and you're used to playing bullet or blitz chess, you will have a habit of moving the first move that comes to your mind. Most of the time, the first move that comes to your mind is not the best move in the position. Take your time to analyze the position and make a more reasonable move.
2) TRY IMAGINE YOURSELF IN YOUR OPPONENT'S POSITION. If you only see the board from your perspective, you won't really take into consideration what tactics your opponent is trying to use. By flipping the board around and looking from your opponent's perspective, you can see which moves or tactics he/she will probably use against you, and prevent them beforehand. Also, you can see which moves that he/she would most likely want you to move.
3) THINK BEFORE YOU MOVE! I know this point is a lot like the first tip, but I guess I'll put this here anyways. Always check your move before actually moving it. Make sure you're not hanging the piece, and make sure your move is not going to allow your opponent to do some tactic and capture that piece.
4) THE OPENING: The opening is very important in standard chess. If you mess up once in the opening, you're most likely going to lose the game. Take your time in the opening to think about what type of opening you want to play.
5) THE MIDDLEGAME(part 1 overview): The middlegame is where things get really tactical and where you'll have to think about your moves the most. This is usually the longest stage of the chess game (unless you get checkmated in the opening). It is also when people start to lose their games. Look for immediate tactics and long term strategies that can last until the endgame in the middlegame.
6) THE MIDDLEGAME(part 2 "pieces"): Yeah I had to make a part 2 to the middlegame so it looks better. Look for pieces or pawns to snack off in the middlegame. If your opponent is rated less than 1400, it's pretty likely that he/she will hang a few pieces in the middlegame. If your opponent is above 1400, the "free" pieces often lead to a tactic to gain the material back or even gain more material. Nevertheless, always confirm that the piece or pawn is a free piece by checking your opponent's possible tactics.
7) THE ENDGAME: The endgame is where the "comebacks" and the "blunders" appear. Although there probably isn't as many tactics in the endgame as the middlegame, you must be careful here and check every move you make. The king is the most dangerous piece in the endgame. Try to prevent your opponent's king by reaching your pawns with two or three pawns lined up together.