Asda sell really nice microplush fleece throws for £5-6 which last really well , are really soft and snuggly , wash really easily and come in loads of colours.
We have end up with loads several over the years as they've migrated into the dc's rooms and the playroom, so I make sure we have enough in the lounge.
They also do blankets and throws that are a bit more expensive that have the microplush on one side and a cream thick fleece to look a bit like the cream side of sheepskin on the other. I got a massive one to have in my bedroom (kingsize ) in soft grey and cream that was about £15-18 - and it's now been co-opted by the dc down in the lounge so I'll buy another one as I want one for me 
TKMaxx/Homesense sell nice throws cheaply too.
I bought a massive world map for £3 in a bargain book shop (The Works I think, they are also online and have regular xx% off sales).
I used cheap colourful £2 fleeces from Ikea as curtains when I moved house and suddenly needed lots of curtains. and if you already have curtains could you pin cheap fabric onto them as a panel to help make them more colourful - loads of gorgeous fabrics on eBay cheaply especially if you want a relatively small amount.
The scratch maps are lovely but can be quite expensive if you get them from John Lewis or dotcom giftshop type places - they're loads cheaper on eBay.
If you're looking for furniture or mirrors etc on eBay, check out the moneysavingexpert.com article on cheap eBay finds - searching on tweaked spellings, doing searches on pick it up yourself items within a 10 mile radius of where you are (or how far you want to go!), and more, all worth knowing.
Sainsburys and asda both have nice home ranges - and if you hit Sainsburys right they often will reduce old stuff as a new range comes in - especially the bigger stores who have say 3 or 4 collections, they'll be changing one of them to bring something new in every 2-3 weeks.
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