Ooh this is my kind of thread
Im bloody awful for buying too much when theres a deal on, eg 50% off at the body shop cos then I'll stock up. I don't mind so much all the showergels as I know they'll get used up, its all the body butters, scrubs, hair masks and body oils that don't get used
Ive given a bag of things to a friend, and the kids have both got a body butter and a scrub to use up 
I find that I don't like wearing body butters after my morning shower as I don't like how it feels under my clothes, but as dh works late most days I don't quite have time to use it up after evening bath when Im sorting ds, dd and 8 week old baby.
I agree with writing a list of things you really like if you think you'll want that one particular item again, and to stop 'saving for best'. Ive always done that up to now, think its pretty deep seated regarding my childhood but now I know I don't have to worry anymore I can use and enjoy things. Plus the amount of things Ive had to chuck because Id 'saved it for best' only to obv have it go off always made me sad.
So anyway Im on my last bottle of toner, and half way through an oil cleanser. Not sure if I'll repurchase that. I have a cleansing balm to use up after...
Have got two tubs of body butter opened, will really try and use up some of that tonight, thankfully dh is finishing earlier today so I'll be able to have time to myself. Ive got 2 hair masks opened and one face mask so I'll use those too. Will prob chuck the scrub that's opened, Ive used it once and not sure I liked how it made my skin feel afterwards. Have chucked an old foundation, a crap mascara and a couple of liquid eyeliners, feel better for it! Im almost out of my face powder and will need to replace that, also want a powder highlighter. Promise I wont go mad in Boots 