How do you make your office chair more comfy?

[imported_jmai22]

Any devices or cushions you guys use to make your office chair more comfy? especially the lower back.

 

[AgaBoogaBoo]

Type R Stickers FTW

 

[eelw]

You throw it out and get an Aeron

 

[TitanDiddly]

Mine has a mesh back, and it has zippers(for removing it to wash, I suppose), so if I wanted to I could open it up and stuff a pillow down in there.