ASOS have released a new voucher coded it says it's only for Students, but I think it's worth a try if you're planning on buying anything from ASOS, well worth it for 20% off!
Voucher Code: OWEEK
The Deal: Get 20% off
Expires: 17th of March 2013
Link: ASOS | Shop women's fashion & men's clothing | Free Delivery & Returns