Write a letter because "To send a letter is a good way to go somewhere without moving anything but your heart." -- Phyllis Theroux
Buy them a subscription to a Caregiver Magazine like 'Today's Caregiver Magazine'. (1-800-829-2734)
Phone at appropriate times (check any time differences and never call after 9pm their time).
Drop by with the caregiver's favorite meal or a plate of cookies. I will never forget a friend bringing me a meal when I was supporting someone else. It was hard to accept but oh so wonderful. It was a gift for both of us. My friend felt useful and involved, and we all ate better that night than we had for weeks!
Offer a few hours of care if the situation allows.
If the patient is unable to be alone perhaps visit and occupy the patient giving the caregiver a few minutes to catch up on paperwork.
Offer to research into respite care, and community and professional assistance. Check out resources like the links listed on this site.
Offer to do specific household chores, run errands or cut the lawn.
Take the caregiver out for a break. It doesn't need to be long. How about a treat like having a pedicure together? Or let them take a walk alone on a sunny day?