This will sound so clichéd. But the best solution for a rough, negative day is meditation, preferably in nature. Honestly, what else can you do but meditate when a day is rough? All the other options I can think of involve trying to distract yourself from those feelings. But distracting yourself from your feelings is really just another way of bottling them up to save them so you can turn them into a health condition later, or explode later, or otherwise have to deal with them later. Just forget the boredom/distraction options and deal with the negativity now. Negativity doesn’t get better with age.
Rather than bottling those feelings, try composting them by releasing them into the earth. That will transform them into something better. I promise. And so does Toni Carmine Salerno’s rainbow (see right).