When I'm having a bad day, I know i need to pamper myself. I usually take myself out for coffee, buy junk food and snacks, indulge in what I normally don't indulge in. Watch anime after anime on crunchyroll, or drink a doubleshot and buckle down and get some work done that isn't due for a while, so I don't have to stress about it later. PC gaming does help a lot, even replaying old games you haven't touched in a while. I also make it a point to tell my loved ones that I'm in a bad spot, so they don't misunderstand my mood swings or instability. (This also helps to avoid more drama, or more stress.) I'm lucky to have a friend who will sit and talk with me for hours on Fridays after a terrible week.
I'm actually having a rough time with it right now; convention time can bring drama with it (especially in a hotel room with three boys, two of which are taken). I've had a stressful year and my creative cosplay isn't finished, so I dropped it and plan to take it up next year. It's relieved a lot of stress, and I'm now able to model some other costumes and closet cosplays of my own, as well. I've used this opportunity to delve into the art of makeup and physically becoming a character, rather than the mechanics of building and designing my cosplays. I find I'm learning more about certain aspects of cosplay I didn't pay as much attention to before.
Sometimes, we just need to take a step back and look at where we are at in life. Being an artist, I know how it feels to want to strive to be the very best, but there's ways to have a good time and grow as a person without killing ourselves trying to be perfect all the time.