If you want to worry less I think about two things that may help:
A - Set a time of the day for worries, and procrastinate worrying until that time. For example, set the worrying time from 18:45 to 19hs. This may sound strange, but it's recommended by some CBT therapists. http://www.cci.health.wa.gov.au/docs/Info-Postpone%20your%20... http://www.getselfhelp.co.uk/worryzones.htm
B - Train! Not following worry thoughts is a skill that requires practice, like building muscle. If you train you become better at it. You may train your attention by noticing your breath and when your attention gets caught by worry thougts, you notice that and go back to your breath. When it happens again, you notice it and go back to your breath. With practice, letting go of worry becomes much easier. You may practice that 15 minutes a day.