Listen to more systems than your own.
Listen to different types of speakers- stats, cones, horns,panels.
Same goes for amps, tubes, solid state, SET, Class A, Class D.
Listen to properly set up vinyl systems and digital systems.
Keep an open mind and an open ear.Don't be afraid to try something new to you just because it falls outside your realm of knowledge.
Always try before you buy.
Buy only if it's better not just different.
If you need less rolled off highs, don't add bloated bass as a trade off.
Seek out a system that has balance.In other words no extremes that draw attention to themselves-ie too bassy.
Don't be afraid to make mistakes.
Realize that your tatses will change as you progress in this hobby.
You may start out as a bass freek, and end up being being something quite different.
Never assume you knowitall, that it's as good as it gets, or that it's all snake oil.
If you feel it is all snake oil, or old hat, then it's time to find another hobby, the enjoyment is gone.
Listen to what others have to say but always make up your own mind about what you feel is right for you.
Forty years in the hobby, almost fifty years as a musician and I'm still learning.
And proud to say I haven't heard it all.