Zebrashoes Unfortunately I have many, many, things, but not a lift. 
Not lack of facilities, but extreme pain, followed by lots no one wants details of.
Recognizing others need what your holding onto ‘just in case’ can be a useful strategy.
If the shop seem ‘ungrateful’ or ‘not happy’ remember that person isn’t the charity, they’re a volunteer, and potentially not with the best social skills. (Apologies to all-rounder volunteers everywhere!)
If there's just been a major influx of long skirts for instance, and you’re the next through the door, the sight of even more, may be betrayed in their attitude.
If it helps to know, even the ‘scam’ bags end up with recipients gaining clothing they need at prices they can manage, I’ve been in one of the ‘scam bag’ sorting centers.
I hate chucking things that could be useful, but that's how I ended up in the current mess. You and me and many others. Worth dwelling on. 
Miaowse totally get it about possibilities of misleading people– I suffer it too- hence the pot giving the kettle a gentle shine on it’s way past.
I wonder if it’s to do with upbringing. I’ve recently been wondering about my need to be truthful especially about my faults, while in r/l hiding my issues for self-protection.
Also how lying was such a bad and shameful thing as a child, punishable with physical pain, yet actually how we were expected to live lying about everything all day every day to protect parent from discovery over all sorts of things.
Changing mindsets is huge, and it is rough that it’s taken so many of us far too many years of trial and error to get ourselves anywhere near where we need to be. Yes to others bringing in stuff.
I’ve managed to stop buying cleaning supplies after realizing I have enough for a very long time to come, even though I do use quite a bit. (will be rebelling against childhood to the bitter end.)
The stuff that's your current struggle, is the stuff I’m no where near yet, but suspect I will have the biggest issues with too.
Thank you for survival ideas. Will have a look for isotonic drink and Dextro tablets – BlueSummerBaby.
Glad to hear you saying you finding it gets easier the longer you do it. The buying for the life we don’t have is an interesting one. In some areas I’m also trying to change my life a little closer to the one I was buying for.
Nordicmom Gosh, that sounds really busy and fairly fruitful. You’re kind of living my fantasy, (brand new more than big enough home, etc) but I can also hear that it brings with it it’s own problems.
Congratulations on the ‘roughly 75% de cluttering’ of the storage unit contents, especially against the pull of emotional attachment.
So much of all of this stuff is psychologically very exhausting.