You open a store to replace one notebook. By checkout, the basket also contains organizers, a pen set and a small accessory that was suggested beside the payment button. None is necessarily a poor product. The question is whether each belongs in this purchase.
Return to the original task and write it in one sentence. Perhaps you need a notebook of a particular format for a course. Mark the item that solves that task and separate everything else temporarily. This makes the additional spending visible without requiring you to decide that every tempting object is bad or that you should never buy something enjoyable.
For each extra, identify a specific use and check what you already own. “Useful someday” is weaker than “replaces the broken organizer beside my desk.” If the item duplicates something that works, decide what the new version changes. A color you like can be a valid preference, but it should be recognized as that preference rather than disguised as a necessary replacement.
Treat accessories as their own decisions
Some additions are genuinely required. A compatible cable or mounting component may be necessary to use the main product. Verify that requirement in the product information and check whether the part is already included. Then compare an appropriate accessory, not automatically the one suggested by the store. Recommendations can simplify discovery, but they do not establish compatibility or the best delivered total.
Other additions can wait. Move optional ideas to a separate list with the reason they appealed to you. Review the list when you have time to check dimensions, specifications and alternatives. Saving an item is not a commitment to buy it later. If the reason no longer makes sense, remove it without treating the earlier interest as unfinished business.
Look at the revised basket total after removing extras. Also check delivery, because the change may affect a threshold. Compare the complete original-task order with the expanded order rather than counting only the amount of discount lost. Paying delivery can still mean spending less overall than buying several objects you do not need.
In the hypothetical notebook example, removing the organizers may leave the course requirement fully satisfied. If one organizer has a definite purpose, assess it separately and include it only after that check. The purchase is then a deliberate combination of two needs, not an automatic response to a recommendation strip.
Before confirming, read every line once, including quantities and optional services. Keep the receipt, then use the purchase as intended. A smaller basket that solves the actual task is often easier to receive, store and evaluate than a collection of individually inexpensive extras without a clear place.