Pick a room to start in. Make a list of what you actually need in that room. Sort the rest of the stuff into categories; charity shop, e-bay if you can face it, bin/tip. Physically take the stuff to charity shops/dump etc.
Do one room a week and you will soon get through it.
1. Clothes that fit and don't have large tears/lots of fraying round collars and cuffs etc.
2. Usable furniture such as bedside table, drawers,desk
3. Toys that are played with regularly and are not broken beyond quick and easy repair.
4. Books that are unread or are old favourites.
List of things to bin
1. Clothes that are badly torn or frayed. 2. Toys that cannot be repaired easily and quickly. 3. Crappy bits of paper, old drawings, dried up felt tips, broken crayons etc. 4. Broken furniture.
List of things to charity shop or ebay
1. Toys that have been grown out of. 2. Servicable clothes that no longer fit. 3. Books in reasonable condition that you no longer want. (ie too young or just don't get read. 4. Furniture that you don't want but is still serviceable.
Go through 1st room and grab say 20 things that are pure rubbish and put them in bag seal it and bin it
Then go in again and grab 10-15 things that are good but no use to use and put them in a box. Then put box straight in boot and drop it at the charity shop.
Then go in and find 10 things that dont live in that room. Pop them in a box. Tak box out of rooma nd find homes for them. Takes about 10-15 mins so you can do it between programmes if you are watching them on Sky plus!
A friend of mine gave me a really useful tip for this. She says you should look at every item of clothing and every object, and ask yourself honestly if you would buy it if you saw it in a charity shop / car boot sale. Visualise the thing lying on a table amid a load of junk with a £3 label on it. If you would buy it, keep it - if not, chuck.