jaysus you lot haven't got a scooby have you! well Ricey's mrs has given you some pointers, here's some more ;
If you're going down the undies route FFS steer clear of Anne Summers and M&S...head for Agent Provocateur if you're feeling flush http://www.agentprovocateur.com/?isource=ga09&cmp=PS010203&gclid=CP7ZwZTJxaQCFU0_4wodTkbCWQ
or Bravissimo if she's got big bangers http://www.bravissimo.com/default.aspx?utm_source=msn&utm_medium=cpc%20&utm_term=bravissimo&utm_content=506392428&utm_campaign=3636914041
If you're going down the jewellery route stick to silver or white gold or platinum....DO NOT BUY YELLOW GOLD!
And if you're skint a voucher book will never fail...it requires effort and thought- make up a load of coupons that have different things on like.."Back rub"...."Dinner for two"...I'll leave the bedroom favours to your own imagination