Depression Support Group
Depression is a real and debilitating condition that is often misunderstood by family and friends. Its meaning can range from a prolonged period of sadness to an actual mental illness with specific symptoms. Find and share experiences with others who are going through the same struggles.
What sort of negative thoughts are you having?
Medication can help - depending on what your diagnosis is. In the absence of medication (or, in my case, with it) I try to use diversion.
Actual physical activity help to divert your thoughts. Forcing yourself into a situation where you need to converse helps but not everyone can do that. And here's the strange one - singing. Yep, put your favourite song on, turn it up as loud as your neighbours will bear and sing. No, it doesn't matter if you have a voice or not - if you can't sing then yell.
Then, when you're feeling better, go look into CBT like these other great folk have advised.