ive got a system to get snags out. my fav hole in the world is pretty snaggy.

if you can feel weight starting to build up on you like and your sure its not a fish reel up gently to where the line is from the tip of you rod with a little bend in it to where your gear is hung up. now drop the tip 3-4 inches and just lightly and very quickly work the rod tip to where you have a little slack when you drop the rodand none when you pull up. you should only be moving the rod 4-5inches and it should be a VERY FAST movement. for me it works 80% of the time. its kind of hard to explain so just ask if you need more detail
Tyler