Sort your sock drawer and do not make it an allegory about marriage.
Weed the vegetable garden and just pull weeds; don't think about sin or anything corroding the soul.
Bake cookies. Just bake cookies.
Don't take a bath. Baths make you think.
Scrub all the toilets. You can't think about anything else but the toilets.
Repair something that's broken--an actual, physical broken thing (Not your heart! Not your hurting heart!)
Go deliver chocolates to a neighbor. Then listen to her for however long she needs to talk. Don't interrupt. Just listen.
Then, watch a comedy on television. Don't analyze the jokes. Just laugh.
Listen to music; dance with children; pick wild flowers.
Find some animals to brush or walk.
There, now. You are truly out of your mind.