Down in the dumps? Something ailing you? Life leaving you behind?
Get a new toothbrush. Seriously. Sharp new bristles magically whisking away grot and mouth filth not only leaves your breath fresher, your teeth cleaner - It makes you a tiny bit happier. Like when you start a new bar of soap and you don't have to risk poor sliver control when soaping your pelvic stink sink.
Or just maybe I'm easily joyful