Personally I'm a loud music & get on with it kind of girl 
I find sorting things into piles helps too, then tackle one thing at a time.
Paperwork - you need a shredder, or at the very least a couple of binbags and buy from somewhere like wilkos a big filing box. I am a bugger for letting paperwork stack up! Put it all in a big pile then start at the top, sort into bills, statements, personal & bin the rest.
Clothes - ooooh I sort my clothes out once a year, its fun! You don't need more storage you need less clothes lol! Be ruthless, have you worn it in the last 12 months [this rule doesn't apply to posh frocks] if not - bin bag for charity shop, same with shoes, belts etc. If you still need storage then try ikea?
Photos - again go to wilkos or somewhere and buy 3 or 4 photo albums, get them on the living/dining room table and sort them chronoloically then get them in the albums.
I bet you could get it all done in a day - buy yourself a nice new duvet set to put on the bed when you've finished too 
Hope that helps!