There seems to be thousands of different grappling moves you can employ in a match. Well, there are thousands of different moves found across the wide spectrum of Brazilian Jiu Jitsu and submission wrestling. However, you do not want to try and memorize a significant number of moves. A much better approach would be to find those moves which are most effective for you and then refining them.
Now, you can learn as many different grappling moves in the gym repping techniques in order to raise your awareness of what the totality of the art revolves around. While this is not a bad idea, you do want to stay focused like a laser on those primary moves which comprise your game.
Which moves would those be? Basically, as you train will start to develop a fluid game which gravitates towards certain particular moves that match skills, body type, and, yes, personal preference. The key point here is that these moves are developed through effective drilling and live sparring. You do not want to pick your techniques solely through static training. We often get a little hung up on running through these moves in a static way because we assume we are learning. Well, you are being exposed to them but you are not actually learning them. You really cannot say you have learned them until you have effectively performed them against a resisting opponent.
Now, when you are sparring, you may be facing full resistance. Being able to handle full resistance is important. The problem here, however, is that you cannot start out just working against full resistance. This is just too hard to do. Unfortunately, many trainers will employ this method exclusively and it is not the best way to go. Rather, sparring needs to be combined with progressive resistance training in order to build up the success rate of grappling moves.
The way to do this would be to take part in a variety of different drills which are intended to help you work against resistance. This does not mean the resistance is full resistance. Even 30% resistance could be helpful because it presents a real energy that is a slower version of full, uncooperative resistance. By developing experience through dealing with energy which mimics the action found in sparring, you can make your grappling moves work in the manner they are intended – in a real situation.