* see a psychiatrist and possibly get on a drug. Can be very helpful.
* see a therapist
* start a regular exercise program and stick with it. Huge benefit there.
* limit carb intake, especially simple carbs.
That's aside, of course, from the physical dangers: diabetes (or diabetes like symptoms), very serious weight gain. That also applied to all carbs, not just sugars but some carbs are worse than others (e.g. high fructose corn syrup, white bread) while some are better (brown rice, whole wheat).