BuyCostumes.com has put out Buy 1 GET 1 25% off when you use coupon code BOGO25 at checkout. There are tons of clearance items available, like this adorable Fuzzy Lamb Infant Costume that is only $6.99 + $4.99 shipping. Plus, you will get an additional 8% Cash Back from Mr. Rebates.
The Chase Freedom MasterCard gives you $100 cash back when $500 is spent within 90 days of account activation. This card makes accumulation and redemption of rewards as simple as possible. Benefits include 0% intro APR for 6 months on purchases and 12 months on balance transfers; 5% cash back every quarter in categories such as gas, groceries, travel and home improvement purchases.