Something as simple as buying a new, somewhat fancy pen, can put a little spring in your step and bring your shoulders back so you walk with a little more confidence.
Buying a new item of clothing or a tool for your job can give you a similar feeling. You don’t need massive expenditure to get these great little jumps in life appreciation. If you make a few small but strategic purchases on high impact items or services, you can feel your life get exponentially better rather quickly.
Just don’t buy loads of things that don’t give a lasting impact. Keep the upgrades small, simple and high impact, otherwise you’re just wasting money.