First: Stand in front of a mirror.
Next: Say, "I love you."
Then: Pick one thing about your physical self that you really like. It might be your hands, your calves, your smile, your hair. Compliment yourself. Not a half-assed, "Well, I guess my (whatever) isn't so bad." No, make it a sincere compliment, such as, "I really like my hair. It's so (pretty in the sunlight/full/healthy/sexy)." You get the idea.
Finally: Feel good that you gave yourself some love today.