In response to Surreyman's comment:
I would disagree - nobody needs anxiety in their life; to any degree! 'Healthy worries'? It seems like you are avoiding dealing with your worries my friend. Anxiety is a horrible burden - mixed with depression, anxiety has put barriers in my life and very deep scars in my arm. Everybody has the potential to cure anxiety; some people require medication at first (that's in no way a long-term solution), it depends on their level of anxiety. Therapy can help, but most of all it is willpower, regular routines, recognizing triggers and dealing with them, ETC! Healthy worries? There is no such thing as a healthy worry. Worries are negative; worries should be dealt with to move on to achieve happiness.
I have dealt with anxiety throughout employment, throughout college (I study psychology) and everyday life.
To come on an anxiety forum and post something like that is quite obnoxious IMO and I'm sure a lot of people on here have worries that are NOT healthy. If your philosophy is to just ignore and get on with your 'worries' then you are avoiding them; that is not healthy.