For Christmas I want to give you a really fast and easy method of breaking in bags. It's only a few steps:
1. Remove all the filler from your new bag or if you are just stitching it don't fill it in with your standard filler.
2. Fill in the bag with plastic pellets.
3. Start breaking in the bag with a normal "finger" method.
4. When the bag grows up, add another part of poly pellets.
5. "Finger" the bag again.
6. Repeat 4. and 5. untill you feel the bag isn't growing.
7. Remove all plastic pellets.
8. Fill in the bag with your standard filler.
Poly pellets are extremaly cool for breaking in bags and they don't do bad things to fabric. With some training you can have a playable, break in bag in an hour or two after stitching it.
Merry Christmas!
Edit: Here are some photos of bags broken in with this technique.
#1 Before

#1 After

#2 Before

#2 After

#3 Before

#3 After

#4 Before

#4 After
