Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

How to prevent myself from buying things I don't want
I found the best way to do this was to make a spending plan at the beginning of the month with someone else. If you're married or in a relationship where you pool resources, then this is a natural way to sync up on your expectations. If you don't have a relationship of that nature, it's still good to have a friend that you talk to about things you are planning on buying. If I don't allow myself to buy things on a whim, if I have to take the time to justify my purchases to someone else, then I have to first think about the purchase and justify it to myself. Often the actual process of thinking it through is enough for me to talk myself out of it. Consider the tactics of car salesmen. Each time you attempt to leave the lot, to think about it overnight, they sweeten the offer to try to get you to buy before leaving. They know that if you leave the lot, you are much less likely to decide that you must have that car. You should have a policy of sleeping for one night before making any purchase over an arbitrary dollar amount say $250, or $500, or $1,000. Having that rule, and following it will save you a lot of buyers remorse. As an aside, I've had my eye on a 35mm prime lens for my camera for over a year now. I was ready to pay ~$500 for a nice lens that was discounted by $100, and I was a little sad that I missed the discount. However, I am very deliberate in my shopping, and I didn't want to buy until I read enough of the reviews to be certain about it. It turns out that the lens has a fatal flaw for landscape photography that most reviewers didn't notice because they were using it for portrait photography. I finally concluded that the lens I really wanted was an $800 lens. I looked at resale prices on my $600 lens and they are in the $350 range. So instead of missing out on a $100 discount, I missed out on a $150 loss trading up to the lens that I really want for the long term.