Cloth diapers on weekends
7th Generation diapers (expensive)
Clean up with cloth kitchen towels
Recycle paper, cardboard, glass, etc.
Reusable shopping bags - tip: get a bunch and keep some in the cars, it takes a while to make it a habit
Save those plastic bags and recycle them at the grocery store
I bought 3 pairs of skinny jeans for little one for $5/each
DH is slow on the CFLs, waiting on the old ones to burn out