To quote Professor Albus Dumbledore, "One can never have enough socks"! I totally agree with him, recently I picked up some cool animal patterned socks (parrots, zebras, koalas and ducks). Or some nice shoes! Or shirts, pants etc. But ok, if you're not looking for clothing then I would seriously suggest buying some boardgames!
Modern games have evolved since Monopoly, Life etc and there are some really cool ones out there. I play games with my mum all the time, our newest favourite is "Sagrada" (The aim of the game is to score the most points by building stained glass windows in a cathedral. You roll colourful dice and put them in a grid to make up your window, subject to various placement restrictions). I would also recommmend "Qwirkle" (like Scrabble but with colours and shapes so it's much more interesting), "Archaeology: The New Expedition" (a card game where you are trying to collect sets of various relics, avoid sandstorms and thieves, and earn the most money for your discoveries), or if you are huge Potterhead like me (maybe you could tell from the Dumbledore quote earlier, but I LOVE Harry Potter) then "Harry Potter Hogwarts Battle" is an amazing card game where you work together with the other players to learn spells, collect magical items, make allies and defeat the villains before they take control of the world!