Stansgran I've never been able to work out why,when you take everything out of a cupboard, and put it back again, there's always more space than there was before 
I like having containers for things.
So for example, in the bureau drawer, there are about ten little open plastic boxes (ex food containers) containing paper clips, rubber bands, matches, shoe laces, marbles, LED tea lights, staples, rubbers. old print cartridges and batteries that are waiting to be recycled- you get the picture.
If things are in containers they're a lot easier to find and so the drawer or cupboard doesn't get untidy because one's DH someone has been rummaging through it.
If you want to actually get rid of stuff, the first question I ask is 'Am I ever going to use/read/wear this again?' If the answer is no, the decision then has to be made whether to chuck it out, recycle it, give it away or sell it.
I find I do have to be in the right mood though! Good luck 