> Don’t assume you’ll make this much money forever.
There is a 90% chance that your salary will increase by 10% per year, on average, during your career.
On average means that sometimes your company will find a lousy excuse not to give you a raise on a given year (you know if it's your fault or not. If in doubt: it's not your fault, they are just being cheap, and you are letting them get away with it).
When this happens, you need to look elsewhere for a better paid job (which are also, on average, more interesting than worse paid ones).
Given that you apply this advice, and barring any black swan event such as the dot-com bubble bursting, you should be able to earn more and more as time passes.
Use this to your advantage!