buy specific light bulb [which would I put into stock so it would be at hand when the actual bulb in use blows
Would you buy the light bulb someday, or would you buy it now because you might use it someday? If you'd buy it now/soon, then I wouldn't call this someday/maybe.
If you wanted to tie the light bulb purchase to a project, the project could be "Stock house for unexpected events" or "House is stocked for unexpected events", depending on whether you use outcome phrasing for your project names.
Similarly, the storage box could be part of a project "Organize house".
Or both the storage box and household could be part of an ongoing project, "Manage/Maintain house", where you put your house purchases as they come up.
Or you could just have a shopping list that exists outside any specific project, and maybe at some interval (every Saturday morning?) you have a Next Action that reminds you to review the list.
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I have
a Someday/Maybe @Shop B:
- browse for wines I like (and maybe buy it)
a Someday/Maybe @Shop C:
- browse for wines I like (and maybe buy it)
Is it that what you would call "shopping whims" ?
Shouldn´t have them assigned the context as fist thing ? If I am not physically in the shop, I can´t retrieve the wines.
This sounds like what I would call "shopping whims", yes. I don't think I'd have this in Next Actions; I think that I'd have a list for this sort of thing, and treat the list as project support material. The list could be called Shopping Whims or Travel Shopping or Low Urgency Shopping, or whatever you want to call it.
And then I'd try to form a habit of reviewing this list at some times that seems appropriate to me. If it's for shopping when traveling, then I'd figure out a way to trigger myself to review it at the same time that I'm packing my suitcase. If it's just for shopping whenever I'm out in the car, I might make a habit of scanning the list quickly right before I start the car to go on drives that will involve shopping.
You could certainly have these actions with a context of Shop A and Shop B. I wouldn't do that because that would clutter up my main project lists to an unacceptable extent, but that reflects my lack of tolerance for list clutter.