There is no secret. At first, you need to be comfortable in your receiving position.
Snatch= Overhead squat
Clean= Front squat
I like to follow my snatch and clean with a double of squat on some cycle when I need to increase my strenght in both of those lifts.
1 snatch + 2 overhead squat
1 Snatch+ 2 Overhead squat.
Same thing for clean, it's something that really help me to be good in reception. I mean, there is no point to going under the bar if you are not strong of flexible enough to have a good reception.