1. Don't ever listen to a clerk in any electronics store in a major tourist area, dept store, etc. They're all scam artists who think only of their commissions who usually know virtually nothing about what they are selling and who in the case of the tourist stores will sell you knock off crap from Asia as the real thing if they think they can get away with it. Do your homework online first. Join forums like this one, get the real scoop, then buy wisely. (Further hint: Used equipment can either be a godsend or a total crap waste of $$$. Use caution buying anything you can't see, touch, and check out for yourself or be prepared to sometimes end up with junk instead of the bargain you'd rather have.)
2. Don't pay 48K to get a degree from some second rate college/design school and expect to be able to get a job as a working designer, photographer et all. They will lie and misrepresent themselves to get your $$$, ill educate you, then leave you to deal with being completely unemployable despite any promises of job placement. Anything they can teach you you can learn on your own via videos and books. A mentor or two is a really, really good thing but don't look for one in a so called design school or in a college. Look for a working photographer/designer, a good one, and ask to be mentored. You'll save yourself a ton of heartbreak and money if you do.
3. Be patient with yourself. Don't expect to take picture perfect photos 100% of the time. Take pics of what you love. Keep trying. You'll get better with practice. Don't expect miracles out of yourself, and while you're at it apply that same attitude to your equipment. Everything has it's limitations, people, gear. Don't fuss and obsess over every little thing. It's just not worth it. If you find you don't enjoy photography as much as you agonize over it? If the up to date must have gear you thought you needed to own turns out to be too much for you? Put the camera down. Walk away and accept that maybe it's not for you. Sell what's not working, buy what does. Better a pocket cam and a happy photographer of snapshots than a frustrated wanna be master photographer forever struggling with something you're not enjoying.
One more, though you only asked for 3...
Peer pressure and envy will kill your bank account if you let it. It's not a bad thing to admire someone's gear. Or that of many as on here, but if it leads you to covet, compete and compel you to buy more than you can honestly afford at any given time that is a very bad thing. Recognize need vs want. Indulge in the one as you can afford it and in the other as little as possible. A reasonable splurge won't lead to bankruptcy, but getting addicted to buying for the sake of buying maybe will. All joking aside, compulsive shopping is an addiction, same as any other, and if it comes down to it? They do have 12 step groups for that...