Start with the heart - My grandma always used to say that :) I love random acts of kindness and it's a great way to show people you care and it's so fun to see how that little something made them feel so good!
I made some homemade chocolate chip spice biscotti last night... I think biscotti wrapped in a bit of fabric might be one of the nicest little treats ever. :) AND it's low fat and has a pretty reasonable amount of calories!
pay the toll for the person behind you, pay for the coffee for the person behind you, put money in an expired parking meter, or buy flowers for a friend just because.