One thing that Rosemary emphasized a lot to make a house a home (I recall 4 different activities throughout the event) was putting up holiday decorations. Since that time, I've found it is the easiest and most inexpensive to jazz up my home. Mostly with items I had on hand (or pilfered from my mom's craft room), my house went from lame to festive. And my 3 year old appreciates my efforts.
Cinco de Mayo:
inspired by oh happy day
FYI: Any twine used in these decorations came from the swag bags given at the event.