To me getting out of my head so speak is a determining factor to eliminating anxiety.
There's different ways of doing that, sometimes it's creative outlets, sometimes physical activity.
However there is nothing that consistently helps me to control it, its more of a combination of things depending on the situation.
Guided self talk, as where I try to change my perspective (without ever directly opposing my previous one) has been my most efficient tool.
When all else fails I scratch myself till i bleed and smoke myself out. =P