But I Still Need Them!

Is it just me, or I always put things somewhere for easy access because I know I will need it again soon. Apparently this is what makes my room very messy. Things are laying on the floor, it is sometimes hard to walk without stepping on something. Of course I tidy things up when I have to, like when I am going to have a visitor. But after they are gone, it will be back to my messy room again. Am I that disorganised that I feel if I tidy things up, it is hard to get it again when I need it? Not that hard, but obviously harder compared to when I put it on my floor/table/bed.
My mum always complain. And I dont know how I will do when I get married and have my own house.