It depends. When I'm in a funk sometimes I feel tired, so I allow myself naps. That can, however, interfere with my regular sleeping patterns so I have to be mindful. I make sure that I eat wisely and don't use food as a crutch or as a "friend" since I have a weight issue. After that though (I give myself an allotted time for "escape into sleep", I force myself to change my environment. Maybe go to a different park for a walk or something like that. My mood usually changes. Surprisingly, sometimes chatting with strangers can be refreshing (not about your problems, just about whatever". I can usually start up a conversation. Go buy yourself some flowers to cheer up your space.