How can you treat an anxiety disorder, on your own?

No drugs, no therapy... Is there anything I can do to help with the nervousness and anxiety attacks? I have Generalized Anxiety Disorder... Blaaahhh, I need help.

General things that you can do is maintain a healthy diet, drink plenty of water and exercise at least three times a week. Try to avoid situations that cause you to be anxious, see if you can set up your support network when you need it.
Dont be afraid to get help if you need it thats what counsellors and therapists are for and something we simply cant do it on our own.
Best wishes

Your main method of treating yourself is to acquire as much information about your condition as possible, and do be disciplined enough to follow that advice...also, get yourself a support system such as your friends, colleagues, family members, etc...
I must say that it is difficult to go it alone, especially when you have panic attacks....

find your brains controls. anything that makes you feel good or happy is a plus when you're in an anxious situation. perhaps your pet cat or dog brings up good feelings. look at a picture or think of them when you get anxious. relax with deep breaths, close your eyes and keep positive thoughts up there.

I know this is not what you are looking for, but maybe something in this saga will help....
I've posted this on several anxiety questions.

About 5 years ago I had a bad mental breakdown that filled my world with severe anxiety. It was a daily struggle to continue my normal life. I did it, though, because I had two young children, teaching job, and loving husband to take care of. Plus, I knew that if I gave in to the anxiety it would become worse and take control over me. The anxiety was severe and is another story. What helped me (cured!)...
I went to see a psychiatrist and was put on a drug call Lamictal. I was already taking a low dose of Zoloft and along with Lamictal I began the long road to recovery. The one thing that helped the most at that time was the one drug I did not want to take: Xanax. My anxiety breakdown occurred when I started drinking too much to escape the realities of life. I'm not an alcoholic, nor was I one then, but I can honestly say that I was relying too heavily on alcohol. I would come from work and have a couple of rum and cokes while cooking dinner. I would get pretty relaxed and sometimes pretty drunk. One time I got drunk from this and had my first huge anxiety attack. I couldn't stop the attack even the next day, or the next, or for about 6 months. No kidding, constant horrible anxiety. Anyway, the alcohol and loss of control now frightened me to my very soul. I would never, ever allow myself to feel drunk or drugged again (and I haven't). I was very frightened to take the Xanax because it is supposed to make you feel relaxed which equated to loss of self control for me. The bad thing about my attitude towards Xanax is that Xanax is THE gold standard for treating anxiety. I was afraid I would feel drugged and that I would become addicted. I wanted to cure the anxiety not manage it. So my long story ends with what I learned. My anxiety was an illness that could be cured (like an infection). The cure for me was Lamictal, zoloft and Xanax. I only took Xanax when I really needed it, which was mostly at night. Slowly my brain healed. After about 12 months I stopped having any anxiety attacs. After about 18 months I realized that I was no longer worrying about having an anxiety attack. I know it seems like a long time, but my anxiety was pretty severe at the onset. I was finally cured. The only left over from the anxiety was a heart palpitation that I would get once or twice a day. Mostly in the evenings when I was relaxing. My heart would thump around and then be okay. I got it checked by a heart doctor and he confirmed that it was residual anxiety. I didn't feel anxious but I believe that was the leftover from the illness. A couple of years after I recovered from the anxiety (never even had a inkling of an attack) I decided to treat my ADHD with Adderall. My doc said to keep an eye on the anxiety side effect of the drug and I was determined to keep things at bay. Amazingly, the most awesome thing happened. The heart flutter anxiety thing completely disappeared as a direct result of taking Adderall. That was so wonderful because now all signs of the illness were gone! I am very fortunate because I had a good doctor and a very determined mind. The drinking that eventually caused my anxiety breakdown was caused by a heavy depression. Now I monitor my depression level (almost never depressed) and make sure that I take action immediately. It has been about 3 years since I was cured from the anxiety and I have actually forgotten what it was like to have an anxiety attack. One last point: People who choose to self-treat their anxiety and do it without the proper medication are prolonging their agony. It's like going to the hospital and refusing the life saving drugs the doctors are trying to give you. It takes a huge amount of emotional energy to try to cure yourself. I chose to use that energy on my family, career, and self. I let the medication work for me. I have no adverse side effects and I am happy and healthy. I hope this helps. Anxiety can be completely cured if treated properly. I still take 20 mg of Zoloft, 400 mg of Lamictal (originally my doc though I was having a bipolar manic episode and began this drug...after we determined it wasn't a bipolar episode we continued the Lamictal because it works for anxiety and depression), and 20 mg of Adderall twice a day. Sounds like alot of drugs, but I feel calm, healthy, and happy. Works for me. Good luck and let me know how things go.