I noticed this in Traktor for beat-matching.

I've been practising getting really tight beat-matching and it isn't hard.

I noticed that when cueing another track there is a orange-indicator that moves around a center point, it seems that most (all?) the time when playing on the beat, it should be in the center.
I tested this by pressing the sync button and it almost always aligns to the center point.

If traktor makes it so easy by having this center point, it makes it real easy.
So for guys who are lazy and use sync, practice and train your ear.

YMMV

Since matching beats goes quickly when you train your ear and practice, I enjoy spending hours finding tracks that go well together and mixing them beautifully lol.