1) Go to some live concerts of your favorite music. It is a great way to keep your ears tuned.
2) Get a copy of Robert Harley's book "The Complete Guide to High End Audio" 2nd Edition. Probably the one book that could be called an audio bible.
3) When it comes to any kind of music or audio system take it from Duke Ellington "If it sounds good, it is good" (to you).
4) If you want to experiment, don't be stopped from trying a component, accessory, tweek or anything else audio, just because someone else said it does not work, has no effect, or is a waste of money. Find out for yourself. Every system is different. (Beware of Trolls)
5) Leave enough money in your budget for lots of software (CD, Records, etc) That is really what it is all about.