Kappa Alpha Theta Stickers and Decals are inexpensive enough to buy in bulk to decorate just about every area of your life. They are also commonly incorporated in recruitment activities.
You might not be able to paint your dorm room, but you can probably get away with sprucing up the walls and doors with colorful stickers, like the Theta Pennant Decal. It's shaped like a sports pennant except instead of a team logo it contains the sorority seal. Put it on the back of your dorm room door or above your desk.
What better way to identify your favorite notebook as yours than by putting a large 4" Round Theta Bumper Sticker at the center. Even if you accidently leave it somewhere, a friend will immediately know it's yours. You can also use this sticker or the "I Love Kappa Alpha Theta" sorority sticker to embellish your recruitment supplies. For instance, if you put a basket full of cookies or kite-shaped pops on the table for interests, you can put a pretty Floral Greek Monogram Sticker on the front.
Spend about $20 on Kappa Alpha Theta Stickers and Decals and you'll have enough to use throughout the semester. Tell your sorority sisters that they can find Theta stickers at Greek Gear as well as buttons, pins, magnets and other small gifts.