Beginner Game Record Sheet
Learn to write down your moves in a game of chess. That way you have a record of your game and are able to play through it and look for better
Former World Champion Mikhail Botvinnik said that, 'an aspiring chess player should deeply annotate games and publish, or at least circulate, the notes to the game so that critical feedback would point out errors in judgement or analysis which could be examined and eradicated.' (In Eric Schiller, The Chessplayer's Laboratory, Vol.1, p.3)
In other words, write down your games and get better by sharing them with others and looking for better moves.