My process used to be:

1. Read the rules before everyone arrives
2. Play the game and have fun
3. Read the rules again
4. Email everyone with everything we played wrong

Now that I have kids I don't always have the luxury of reading the rules the same day we play the game, so what I usually do is I read the rules a few days in advance, which means I won't remember as much when the time comes to play, so then I end up complementing that with a rules explanation video.