Fuel gauge intermittent issue of not working properly

Fuel guage is all over the place. Almost goes with bumps in the road. Mostly sits on "E" with the idiot light on. Doesn't drive strange, at least with this problem and as far as I can tell. I have no problem with determining mileage but it does get kinda annoying especially when it is having a rough day and the dinger goes off every 5 seconds. This is fairly rare though.