I'm in the same position as you! It's a hard hard task, but completely satisfying once it's done, and it makes you feel so much less stressed..
I've got two weeks off work now ( I work as an LSA in a school), so I'm excited to get cracking on. I've already cleared under my ottoman bed and chucked or donated 6 bin bags already.
My problem is the reason I take so long is because I find things I've not seen in ages, have a little fashion show, think ill save them another few years incase they come back into fashion, have a sing, put a hat on, try on the make up that I thought I'd lost, read old notes etc.. it's literally like Christmas
..it just takes me a bit longer than it could, because I fart arse about. I know though that once it's done, I feel much better and happier.
I do one room at a time, and one drawer/cupboard.
Good luck! Xx