Does anybody have experience with increasing the magnesium in their diet instead of taking a magnesium supplement?

Due to my budget, I have been trying to cut out as many supplements as possible. I didn't realize that magnesium helped with TMJ, so I stopped it thinking it wasn't helping any of my other symptoms. I'd really like to stay off of it if I can, but might try it again for a month or so to see whether it improves my TMJ. I would, however, prefer to get magnesium for food. Has anybody tried to replace their magnesium supplement with high magnesium food?