Great thread, Andrew. I have done a lot of solo kayaking, including 200 mile river trips with Class IV rapids, and one technique that really works for me is what I'd call "self-coaching." When a situation becomes challenging or dangerous, I literally talk myself through it, often giving myself instructions out loud. "Great job! Now watch this next wave. Good brace! Keep your edge up! You've got this!" Yeah, it sounds corny, but it really works. It's almost like I'm seeing myself in the third person and this allows me to evaluate my performance in a calmer, more methodical way and really tap into my training. And most importantly, it keeps the negative thoughts out! The time for doubt and fear is on the beach. Once you've launched and passed the point of no return, you've got to remain focused and positive until you're back in safe waters.