Although Tesco have stopped their "Boost" promotions, you can still exchange your Tesco Points' Vouchers online for restaurant vouchers, whereby you get 4 times the value of the voucher. So, for example, if you have a £5 Tesco voucher, you end up with £20 off the food only (doesn't count with drinks) at your chosen restaurant.
Well worth having...!!
Non slip/slip resistant bath mats