Mine is simple. I'm going to make a list of everything I bought and services I paid for in 2015 and mark what items and services were useful and what were a waste of money. For example, I bought a $900 Samsung tablet back in February 2015 I think the tablet is useful, so that was money wisely spent. I bought two of those infrared electric cabinet heaters back in November for $100 each and I think they were a waste of money (I returned them).
Anyway, my goal is to become a wiser spender. That's all.
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What's your new years resolution?