Myth 1: Build an awesome product and they will buy it
Reality: If you think it's awesome, doesn't mean everybody thinks the same. No matter how awesome your product is, you have to take their hand and walk them through every step before they even think about (maybe) paying
Myth 2: Be nice to people, do whatever it takes to please them and they will love you
Reality: It's almost impossible to guess what every person needs, ergo, you just exhaust yourself for nothing and gain the reputation of a pushover. Do whatever it takes to keep yourself happy. Removing the burden of keeping you happy from your family and friends makes them way happier.
Myth 3: A company you work for uses you. They keep most of the profits, and you're just stuck with a teeny-tiny percent
Reality: When you work for somebody, it's not quite "they hired you". It's more like "you hired them" - to take care of marketing, customer acquisition, payroll, legal shit, etc, etc. Yes, it is damn expensive.
Myth 4: You should quit smoking, cravings will go away in 2 weeks, and you'll be feeling soooo much better!
Reality: Nope. First of all, cravings don't go away even after 2 years. Second of all, if it'd really make you feel that much better, there wouldn't be any smokers left in the world
Myth 5: Marriage changes everything
Reality: It changed my last name. That's pretty much about it.
Myth 6: You need a good education to find a well-paying job
Reality: I know way more people who regret ever going to a university than the other way around
Myth 7: If you work hard and you can achieve anything
Reality: Working hard is not enough. To achieve anything viable you need to work both hard AND smart.
Myth 8: The world is so amazing and it loves me
Reality: The world doesn't give a fuck
Myth 9: The world is a dangerous place and it hates me
Reality: The world doesn't give a fuck
Myth 10: You don't need alcohol to have fun
Reality: You don't need running shoes to run. And yet, it fucking helps!
Myth 11: Immigration is very difficult (if not impossible)
Reality: It kinda is difficult for the first 2 years. Given you don't get stuck in the wherever-you-are-from communities, of course. One eventful day you wake up and realize you now understand deeply 2 cultures. And that there is a ton of bullshit in each.