Xyphen,
For me it begins as a tightness in my chest, then my heart begins to beat faster, then my breathing increases and my mind begins to race. The minute I would begin to feel any of these things I would begin to worry. I would think "How bad is this going to get? How long is this going to last? This is going to keep me up all night!" The worrying definately made the anxiety worse for me.
Thats why now the minute I begin to feel any of these things I just think "Well I guess my friend anxiety is going to visit me for a bit. Hi there. While I don't enjoy your company I know I can't make you leave so lets do this." And then I talk to it in silly voices.
For me the worrying was the part that made the anxiety even worse. So I decided I'm powerless against it, its not going to kill me, so no need to worry and make it worse.
Hope this helps.