The Laureates showed how such effects of expectations about future economic policy can give rise to a time consistency problem. If economic policymakers lack the ability to commit in advance to a specific decision rule, they will often not implement the most desirable policy later on.
Now, I know they don't mean me, and they're referring to central banks, but I enjoy hearing the pros tell me if you set a spending plan and a budget, you should stick to it.
I realize they're not being prescriptive, just describing why things go wrong. But I like the implications: Do not waiver. Be strong. Stick to your guns. Ignore the little blips, and all your financial worries will eventually resolve themselves.