I agree with Diva. Postive visualization is a wonderful technique (of course, so are the ones Casey suggested). Another thing you can do to assist in the positive visualization is write "reassuring thoughts" on cue cards. Then, you can visualize, look at the cue card, and visualize again while thinking the reassuring thought. For example: "I will get through this," "Flying is safer than driving," "Breath in....breathe out", etc.
Good luck,
