When you're new in a job, you absolutely have to learn some things the hard way — how else will you learn? Fresh employees are always making lots of mistakes. They're new, they're learning, and sometimes that makes you, the seasoned employee, giggle a bit. Sometimes they don't understand rules about when to cut corners or stick to the books. Other times, they're not sure when to get a manager involved or when to handle customers on their own. At least as a longer-term employee, you've already m…