The best solution to worry of any kind is retrospective analysis. Think about something similar that you have worried about (and solved) in the past. Then, imagine yourself looking back on today from a time in the future. Find a way to utilize the same strategies that have worked in the past to solve today's worry, but think about it as if you were in the future, way after the problem has been solved...This provides a realistic mental goal.

If constant worry is your thing, eliminate reinforcement schedules. Chronic anxiety is often self-serving. You may feel bad/guilty for NOT worrying. Find a way to reinforce every thing that you do that involves trust, initiative, risk-taking (the smart kind, like approaching a potential date), and the like. You will soon realize your own potential for self-determination. Also, you'll develop coping strategies for situations that don't go as you planned.