Holiday swapping - book holiday that allows cancellation up to 7 days before departure. Then keep watching for price drops. If you see a considerable price drop, cancel your booking and rebook the lower price. Of course, don’t forget your smarty data...
my favourite bargain was finding Smarty, particularly the great deal for roaming in Europe vs the extortionate giffgaff deal. Although I do most of my bargain hunting on line, never rule out the high street.
