If you just practice and learn to keep your hands up, punch with your hands up (sounds silly, but many fighters drop their hands to their chest or lower before punching), and to bring your hands right to your cheeks/eye level after punching, you won't believe how many shots you will catch without even trying. I would say this and learning to judge distance and use your feet to keep you out of harms way/lateral movement are more accessible to any fighter. Good head movement takes a little more of a knack I think.. At the end of the day every righter is different, but I think this is generally true. Watch Amin-60s bout, a big reason he beat his opponent to the punch when they would get in an exchange is due to what I explained in my first point. Edit: When you do practice head movement, use your legs (squating) and hips (twisting) more than your waist (leaning).
Bobbing and weaving combined with a high guard defense. Look at how elusive Mike Tyson and Joe frazier were in their prime. The bobbing and weaving sets up the combinations. Joe frazier only needed one punch though, his left hook.
Do you know how exhausting all that is?! It's truly amazing how guys do that without getting exhausted. :shock: I'd be better off not gassing and just stay on the outside and just throw counter jabs all day. I'm a lazy *******, I know. Although if I could keep bobbing and weaving for several rounds while being able to keep a high work rate, I'm sure to do that. But it sure sucks when you hit the wall and end up being nothing but a punching bag on legs.