There is a craft shop/ice cream parlor/tea room business across the street from our house. If I feel the need to get out of the house, I just go over there and get a $1.50 scoop of gourmet ice cream in a fancy glass dish. They have a high chair that I put DD in, and know us well. Once a month or so, I'll have lunch there. Something yummy like cashew chicken salad sandwich, cream of chicken noodle soup, and a piece of fancy pie, all for about $8-10.
I also like to go to the library alone. It's two blocks away, and I'll take the cell phone w/ me (on vibrate) and have DH or my FIL call me when DD is getting fussy and needs nursed.
DH and I try to go get out alone once or twice a month. Usually we go to a matinee movie while my in-laws watch DD.
Honestly, one of my best treats is on weekend mornings when DH takes DD and feeds her breakfast while I sleep in for an hour or two.
: Also on the weekends, DH will take DD while I take a long, hot shower. Aaaaah.
Some nights after DD has gone to sleep, I can talk DH into giving me a massage. Double aaaaah.
I love to cook, and I do find it relaxing and fulfilling. A friend of my mom's has offered to teach me anything I want to know about traditional, from-scratch cooking. She is going to teach me to can, make jellies, make homemade butter and buttermilk. On those days, DH will probably take DD to go visit the grandparents. I can't wait!