When you live in a small space the rooms you have need to be multi-functional. You may not have a separate office, dining room or kitchen and your rooms will have to serve more than one purpose.
I prefer the homely vibe of multi-functional spaces. They feel more lived in, cosy and welcoming. By contrast, the separate dining room we had in our previous home felt cold, sterile and empty most of the time. Yes, it came to life when we ate in there with friends or family but that wasn't very often. Likewise, our study/fourth bedroom was never a pleasant room to work in because it was a magnet for clutter. We could close the door on the mess but working in a disorganised and untidy room felt uncomfortable and uninspiring. We could have decluttered it but because it contained so many random things we never got round to it until we came to put our house on the market nine years later. On a very small budget and in a short period of time we made it look presentable by clearing the clutter, decorating it and turning it into a spare bedroom/study. For a few months before we moved we enjoyed this space but for the previous nine years this room had simply been a WASTE OF SPACE.
After the hard work of major decluttering I am enjoying the smaller but clearer space of our new home. Our kitchen feels sociable and warm as well as functional and I don't miss our old dining room. We eat in there as a family and with guests (we have an extending table) and it is a great place to congregate. Our living room serves us well as a place where we relax and work and, because we keep it tidy, working at the desk in there is much more pleasant than in our old messy study. We still have clutter hotspots (the loft, understairs cupboard...) but we don't have rooms devoted to clutter as we did in our old house. Our house gets untidy regularly but the clutter doesn't silt up like it used to. Clutter in a smaller house is so much more noticeable and demands to be tidied up.
If you have a room that you currently use for a single purpose you might want to make it more multi-functional. You could create a reading nook, craft space or musical area in a dining room or a living room. Or you might want to reorganise a room to suit your current lifestyle and interests. I have a friend who is currently reorganising her living room because she wants to have some tropical fish. She is giving away her rarely used dining table and is planning to put a modern aquarium there instead. This will give her hours more pleasure than the unused dining table; her reorganised living space will suit her needs and improve the quality of her daily life.
If you have a cluttered spare room or garage consider blitzing it and turning it into a useful space. Don't let clutter trap you in the past and prevent you from living the life you want to lead - like we did for nine years.