The power of an abundance mindset

Lately I've been reading and thinking a lot about the scarcity vs. abundance mindset. A scarcity mindset promotes competition and anxiety. An abundance mindset promote cooperation and positivity. I'm trying to act in ways that reflect abundance, not scarcity.

Changing my mindset with regard to money has always been difficult. I have always felt a deep aversion to spending money on myself, on anything I would deem "frivolous" or "too good" for me. I see now how that mindset is an extension of my excessive anxiety and default assumption that I'm not worth much. It holds me back from making money investments now that will pay off dividends in the future.

What's your relationship with money and how do you cultivate an abundance mindset?