Thank you all for the responses; I will refer to them regularly whenever I get the itch to keep unnecessary items.
I have just returned from a week-long wedding celebration. Lots of gifts (and boxes) were exchanged, so your advice comes in handy right now.
lizzzi - I see. The default is to toss with an exception for imminent moving.
ketchup - Yes, resale is important to remember. Why don't printers deserve protection?
plainjane - What did you do with your "dead" electronics? I still have all my old laptops. There are no electronics recycling programs in the area.
Cromacster - Now that you're settled, which ones did you keep? What are your standards for deciding?
frugaliknowit - You just reminded me that receipts can be clutter too. What do you use to scan receipts? Is it just a regular scanner on your printer one of those dedicated receipt scanners?
Astatine - Sounds reasonable. I'll keep the big electronics boxes.
eyem - Some of my relatives re-purpose the boxes in their garden to keep down weeds. You'd think the toxins in the ink might not be good for the water table or the vegetables. How do you re-purpose them?
Rural - Thanks for the description of how you re-purpose the boxes. I never seem to have a use for them other than holding the original object.
Holyoak - Thanks for the selling tips.
hybrid - A few weeks, or before the return period expires. Do you ever resell the item? If not, how do you dispose of the device?
theadvicist - Fad purchase, as in you won't use it regularly? How do you decide the item is a keeper?
arebelspy - Buying less, keeping longer... It's dawned on me that the box problem is probably a symptom of an anti-mustachian/ anti-frugal problem. It suggests that I'm purchasing too much. Hmmm.
LibrarIan - You've just given me another standard - keep the box of the items you know you love. Chances are someone else loves it too and will want the box to go with it. Thanks.
Mrs. The Butler - Yes, it's the awkwardly-shaped items which come with pre-cut foam which cause me to hesitate tossing the boxes. I'll keep those.
Elderwood17 - When I get more space perhaps I'll do that too. My problem is with so much space I will have no discipline at all and will fill it with boxes I should recycle.
Thegoblinchief - Keep boxes for one-of-a-kind items. Gotcha. Thanks.
Greg - I see. Keep boxes for your personal use, but don't become a warehouse for other people's stuff. I can imagine the car parts boxes were overwhelming. My dad likes to keep those things just because he knows they are valuable, and someone somewhere might want them. In the meantime he' surrounded by it all. I would feel suffocated. Thanks.
CommonCents - I'm a list person, so thanks for the bullet point guidelines. You really summed it all up for me.
TeresaB - My electronics are fragile and hard to pack, so I guess the boxes will stay. Thanks.
Zikoris - Ha! Concise. You made me laugh. Thanks.
acorn - Good point about harboring pests.
GuitarStv - Best use of space... yes. You've got me thinking beyond just tossing or keeping the boxes. Now I wonder if the useful boxes are in the best spot. Thanks.
NoraLenderbee - Thank you for the input.
galliver - Never thought of using the boxes as furniture, but that's taking my mind in new directions here. And why have I never thought to break down the boxes until I need them? I'm an idiot. Thanks.
minimalist - Thank you for the response.
deborah - I have limited space as well. Thanks for answering.
Mrs. Frugalwoods - Ha! If I can't see it, I still think about it. My problem is I organize even the stuff that should be tossed and I feel great about the neat labels. Then I wonder why I bother to keep any of this junk; I feel as if I'm wasting space. Oh well... Thanks for the input.
Thanks again, everyone.