The DE bag also teaches you to stay in balance. When you miss a punch, check to see how your balance is. If you are not balanced, then you are reaching into your punch too much and losing balance.
Exellent advice, as was ambertech's. Other than what was said allready this is the routine i have been using on my double end bag, i switch it up every couple weeks.
rounds- 3 x 3mins / 2 x 2 mins / last round 1x5mins
3 min rounds: (using 12 oz gloves)
1. jab - slip, duck, weave: i work on taking at least 2 steps to come in throw the jab and then when i hit the bag i plant my feet and work on slip, duck, weave the bag. straight back out..... repeat.
2. Jabs- Circle: this round i try to keep a pretty consistent pace and range with my footwork. However, i work on doing the opposite with the jab not keeping a predictable cadence I.E: 1,1,1....1,1...1....1,1,1,1,1. i do this circling the bag clockwise 360 degrees, then counter clockwise 360 degrees, back and forth while concentrating on constantly jabbing.....
3. jab/cross: 1,2 in-out and circling (staying in the pocket every couple times). step in with 1,2. slip, duck, weave.... back out. while circling 1,1,1,2. switch directions 1,2. etc.... you get the idea. combine the drills from the first two rounds, just add the cross.
2 min rounds (i do this with weighted gloves 2pds per hand).
1. Standing square to the bag, feet shoulder width apart, i just throw straight left, right, left, right....... working on rolling my hips and shoulders to put my had on the bag, real short punches (the shoeshine basically, thumbs up). I try to speed up and slo down, back in and out so im shortening and lengthening the reach of the punches, but never stop my hands from moving. (your arms will be Jello)
2. Same thing as above only now with a short hooking motion. keeping elbows tight to your body and twisting back and forth: left, right, left, right, etc...... (your shoulders, abs and obliques should be on fire after this drill)
LAST ROUND 1X5MIN (i use 12oz gloves for this round, same as the first 3x3)
basically, your sparring the bag, throwing combos, ducking and weaving, circling, etc..... try to throw as many shots as you can and keep moving.