Answer by A Quora admin:
1) No matter what your position is, you are completely expendable.
2) Don't complain to your boss unless you can make a business case as to why your complaint is valid.
3) Know your company policies inside and out.
4) Results are what matter. How "hard" a worker you are doesn't.
5) Putting in long hours doesn't make you a good employee. It makes you an inefficient employee.