Buddhist meditation for intrusive thoughts and anxiety
I find these videos by Ven. Yuttadhammo on anxiety very useful:

Monk Radio: Calming Down, Panic Attack
Monk Radio: Meditation for Anxious People
Q&amp;A: Anxiety and Depression
Monk Radio: Relaxing in Life

If you like to learn more about this type of meditation (Vipassana) practice you can find his introduction video series to the method here.
May you be well and happy.