Here’s my Q&A column from the WSJ this week — and if you have any questions for me, you can tweet them to @danariely with the hashtag #askariely, post a comment on my Ask Ariely Facebook page, or email them to AskAriely@wsj.com.

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Dear Dan,

Whenever I work the night shift, I wind up raiding the fridge—and ruining my diets one after the other. During the day, I manage to resist the temptation, but at night, my self-control seems to stop working. What should I do? 

—Meni

What you describe is a well-known phenomenon called “depletion.” All day long, we face small temptations and do our best to resist them. We maintain control over ourselves so as to be productive, responsible people and stop ourselves from caving in to our urges to shop, procrastinate, watch that latest cat video on YouTube and so forth. But our ability to resist urges is like a muscle: The more we use it, the more tired we become—until at night, it just becomes too weak to stop us. (This is one reason the temptation industry—bars, strip clubs—operates mostly at night.) One way to overcome this problem is based on the story of Odysseus and the sirens. In this story Odysseus told his sailors to tie him to the mast as they sailed near the island of the sirens and not to untie the ropes under any circumstances so he couldn’t be tempted to jump into the water and swim toward the sirens’ seductive voices. The modern equivalent of this tactic? Keep all tempting things out of your house. You can hope that your future self will be able to resist temptation, buy the chocolate cake and eat just a sliver of it every other day. But the safer bet is not to keep chocolate cake in the fridge in the first place.

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Dear Dan,

At work, I have no problems giving my subordinates feedback about their performances and suggesting improvements. But it is harder for me to give feedback to the woman who cleans my home. So I’ve adopted an indirect approach: Instead of giving her pointers in person, I leave her a note. Is there a better way? 

—Galia

Leaving notes isn’t ideal. Would you leave notes for your kids on how they fell short on their chores? Would you give your husband written feedback on his performance in bed? In general, when results matter, communicating while the task is being performed (or immediately after) is the way to go, and communicating face to face makes quick communication much more natural. It may not always be fun, but it makes clear to the person performing the task what the feedback is about—and offers a greater chance for learning. The second part of your question involves the different ways you treat people at work and your cleaning lady. I suspect this difference comes from your general discomfort about having someone else cleaning your house (maybe it is something you may feel you should be doing yourself). But you’re not really helping your cleaning lady by withholding timely feedback. My suggestion: tidy the house up a bit before she shows up (as many people do), leave a generous tip but also start be more diligent about pointing out the dust bunnies she missed.

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Dear Dan,

My 10-year-old daughter wonders: If a child has been really mean to her best friend (for example, by tattling on her) and their friendship falls apart, how do they manage to become best friends again after only a couple of days? 

—Aviel

That is the wonder of bad memory. We enjoy this benefit when we’re young and then again when we’re old. In between, we’re unhappy and vengeful.

See the original article in the Wall Street Journal here.