10 Ways to Be the Ideal Houseguest
Thank your host three times: When you arrive, when you’re standing in the foyer ready to leave and once more after you've
gone with a thank you note.
Make it a handwritten note—here, e-mail will just not do. Throw in a detail about the fun you had and finish with an offer to open up your own place later on. For an optional but memorable thank you, pick up a fresh bouquet of flowers and leave them in a vase on the kitchen counter with your note.
So maybe you can’t change your health overnight. But you can get a head start.