You have more strength, courage and power than you realize. When you feel fear - the autonomic state - instead of letting that paralyze you or overwhelm you - use it to spur yourself - to perform at your highest level. If you only have 1 shot - that means you have the opportunity to win - to perform at your highest level.
In a dream... Realize (while still inside the dream) that you control everything - because it is just a dream - it's like the matrix - and you're Neo - if you can just recognize your own power - you can do anything. The only limit to your power on that playing field is you. So take control. It's as simple as that. In real life you're bound by gravity and logic - in the dream you fly, for example, if you can only imagine yourself doing so. I have dreams where I can literally levitate at will. Now take that power - from the dream - back out with you into the real world.