When you have depression, one of the most damaging effects of your disorder is lack of motivation, a state that inhibits your ability to overcome your condition. Eating the right food is important, and while people with depression sometimes feel like they don't want to eat at all, it's important that they make the effort. Instead of eating "comfort food," which is seldom very comforting, it can help to get some fresh fruit and vegetables, as well as carbohydrates from pasta or potatoes.
Drinking lots of fluid is also vital to mental wellbeing. Ideally, five or more glasses of water a day prevent you from becoming dehydrated and depriving your body and mind of the energy that is so vital. Having the strength and sharpness to send indications of depression fleeing is crucial, and your diet is likely to play a key role in this.