I try to give the jumps very memorable names. Instead of the "yellow and black" which can get confused with the "yellow and blue" I call it the "Bumblebee." Often at shows, they have plants and decorations on the side, which leads me to the "fern" or the "tree." Also, just call it what it is! Gate, oxer, "OMGMASSIVESPREAD," step oxer, etc. It really helps to watch someone do it, too.
Lastly, when you're naming them, include the turns. You don't want to know how embarrassing to be at a show and forget all the turns to the jumps, and have to circle around a couple times to find each one! (Not that I've done that...Hehe..)