You dream about the Olympics for so long and you have that one day, then it's over, and when you don't run well there is this huge letdown. It took me years to deal with that. I feel like I almost had to cleanse myself of that experience.
The only thing that scares me in the tech area is that it moves so fast that you have to be ready to invest in 20 things. Because if you just invest in one, next week, somebody has a better mousetrap, and you get taken to the cleaners.