I'm not sure that I did sign a voluntary bump voucher. I was involuntarily bumped (I got to the gate, there were not enough seats, and I did not have a seat assignment, despite trying to get one via online check-in the day before, trying to get a seat when checking my bag several hours before the flight, and then waiting at the gate for a GA to show up - unfortunately, no GA even showed up to the gate until 20 mins before takeoff because they were trying to reboard a flight to Cleveland that had an engine fire on the tarmac - this was in Richmond, June or July of this year). Myself and one other pax were denied boarding because there were not enough seats and we did not have a confirmed seat (thanks to my companys' travel service that doesn't seem to be able to confirm seats).

I did sign something that entitled me to the $300 flight credit and a FC flight the following day. I then actually had to go back to the TA (according to the GA) to get a meal and a hotel accomodation

It took me forever to convince the TA that they had to provide this, then it was not initially satisfactory - they wanted to give me a meal credit, then tried to put me in a hotel (actually more like a motel) that served no meals! After confirming with the shuttle bus driver for that "accomodation" that there was no meal service, I had to go back and wait in line at the ticket counter to explain that I had no transportation and was not going to be put in a place where I could not have dinner (and a glass of wine, after this ordeal), so they actually found a place for me that had a restaurant (it was a Holiday Inn, so it wasn't great, but it had a restaurant).

I was obviously involuntarily bumped from the flight, because they could not find anyone willing to give up his or her seat. However, it seems as if I might have done the wrong (perhaps naive) thing in this situation by signing something. I would like to know how you would have handled it differently so that I can learn from my mistakes.