How ya goin mate , these are things that i do on my heavy bag
put on your gloves and go 30 seconds flat out followed by 30 seconds rest
repeat about 6 times
you can do same as above but with kicks .
this is a 360 degree drill i got from Krav Maga your supposed to do it on a person but i do it on the bag.
Start off moving around the bag doing various hand strikes , punches , palm strikes , forearm strikes , imagining that there are arms sticking out that you have to control as well . Do 3 laps of the bag
Next do 3 laps of the bag only doing elbow strikes at all angles , up , down ,diagonal and horizontal
Next do kicks and knees , i have my bag on a rope so i can lower it , i'm a Wing Chun man we don't kick high , do that for 3 laps
The next 3 laps of the bag you go around as fast as you can putting it all together doing palm strikes , punches , forearm strikes ,ebows , kicks and knees make sure it all flows and imagine the human arms are still sticking out that have to be monitored when you strike.
I also practice very close range striking with my chest about 6 inches from the bag doing a burst of about 3 punches , accelerating them as much as i can.
You can also swing the bag and when it comes back you can step 45 degrees off line so that are practicing the footwork for avoiding a weapon attack .
Just use your imagination mate theres lots of stuff you can do .