We used the gel Simply Thick it was the only one that worked at all for us. My mom never liked it in water. The most quenching beverage we could find for her was Kool Aid and Root Beer they both were good with the simply thick in it. I purchased it by the case off Ebay making the price much less expensive. It comes in a couple consistencies depending on your needs.
The other tip I read several times here, was a lot of Pals were able to drink straight from the faucet by bending down to the sink, I guess when they bent over it allowed them to control exactly when they pushed the water back to the throat, I realize this is probably not an option for many.
One more tid bit, they make special cups for drinking that help to tuck the chin down for swallowing. They have the top cut out its something you could easily do on your own as well.