Generally, neither the good times nor the bad last forever, so try to keep perspective. Believe me, it's as tough to restrain yourself in flush times as it is to cheer yourself up in bad. Although the first couple of years in business may be more intense than others, you're always going to have stress and just one more thing to do. If you're really an entrepreneur, then this is the life you're going to lead. Find a way to live life and run a company.
Roller coasters are scary, but they're also fun.