buy / borrow these books, and work through them
(http://www.amazon.co.uk/Mind-Over-Mood-Change-Changing/dp/08...)
(http://www.amazon.co.uk/Overcoming-Anxiety-Helen-Kennerley/d...)
Find a friend to help give you a poke now and again.
Here's an Australian website that is often recommended.
(http://moodgym.anu.edu.au/welcome)
A few weeks work will drastically reduce anxiety.
{Start-up idea: MoodGym but better.)