fuel gauge problems

I'll look into these suggestions as soon as I get the chance. I don't know if I mentioned though, The gauge was working fine for a two or three months before going dead. I don't know if that means anything or not. But it seems like it would rule out bad connections where the wire attaches to the sending unit. Although not necessarily. You would think all the taking it off and on would get it back if that was the case. I don't think I even drove from the last time I saw it working to the time I noticed it wasn't, so if something came loose inside, I don't know how. I need to drive it long enough that there isn't going to be a high enough level of fuel to spill out when I take the unit out, if it comes to that. It probably will eventually.