Double and triple jabbing, particularly amongst pressure fighters and swarmers.

Just because you're not a slickster, doesn't mean you have to lead with your head and come in with a power punch. Jake Lamotta really had a lot of success doing this against SRR, he'd bore in by flicking the double/triple jab and then dig to the body or the head, often throwing the left hook off of the last jab.

I agree 100% with jabbing out, too. It's always beautiful to see a guy land a good combo on the inside and then jab as he's stepping out. It usually lands because at that point the opponent thinks the attack is over and the hands are just coming down.