Reastie do you have a Tiger/Flying Tiger near you? They have all sorts of random things and many of them are a pound. Loads of kitchen things, bathroom stuff, cosmetic things, candles etc as well as things like notebooks and fun stuff. It is seriously my favourite place to browse!
Alternatively, but in a similar vein, if you have an IKEA near you, and can face going in, the marketplace always has random stuff dead cheap.
I would personally avoid Poundland and go for Home Bargains or B&Ms instead - they always have fab wee puzzles and things for a pound - great stocking fillers.