Try out this strategy, strike things quickly out of your need/want list and be content, so they no longer become a problem and hindrance to your plans to save/invest.
Interesting, I doubt there's anyone that is financially capable of doing something and they wouldn't do it especially when it has to do with the examples you gave instead it's those that aren't financially stable that get encountered with such problem. Understandable the OP is discouraging procrastinating which isn't a wrong thing as those guilty of this act has regretted in the past.
Having to cross things off your list doesn't automatically mean they have to be things far above your financial capability. You could cross grocery shopping off your list and this will help with knowing what to do with the spare funds.