Some great tips from PPs. My tip would be to be ruthless. Forget about who gave it to you, why you bought it originally, if it serves no purpose now, it's gone. I really struggle with this one so I often put things in a box and put it aside to re-look at later. Have one box for the bin, one for charity, one for ebay if you can be bothered.

I have sold some things on Ebay as I felt they were too good to just throw out or give to strangers but for the most part I have found it's a waste of time. The main things that I have found sold well were big ticket baby items that were pickup only like the bumbo, walker, jolly jumper, nappies (on FB not ebay), hardly worn brand name clothes but other things like cheaper branded clothes often don't sell or aren't worth the effort in listing. After spending 3 hours taking photo's & writing listings for a dozen items, sell maybe 6 or 7 if that, then go & forth to the post office 3 times because people never pay at the same time or arrange pickup with several people meaning I have to be home at particular times for several days because they invariably can't come at the same time, paying ebay & paypal fees, the cash received is definately not worth my time. I've been caught out a couple times on postage as Australia Post seems to have really tightened their rules and increased their prices.

Another tip is not to do it all at once. I like FlyLady's tip - have your bin & giveaway boxes ready, set your timer for 15 minutes and go flat out until the timer goes off. Once a day until the room is done. Or 15 minutes in one room, then 15 minutes in another room and so on if you have more time available.