Someone is bound to say it, so I'll go ahead and get it out of the way... "Right before I hit a big jump, I usually use the searchbar to get the balls for it."
Don't think about what will happen if you fall. Think more about what will happen when you stomp the landing... the crowds will be going crazy. Better yet, don't think about what the crowds are thinking about you; everyone has to start somewhere, and everyone falls/looks sketch on their jumps. As you approach the jump, calm down as much as you can- don't get excited and let adrenaline take over.