What do you wish you knew about your job when you first started out?
Systems Analyst in Johnson City:
"Never Give Up On Learning."
Start young and never quit learning new things. You may be "slave to all and master to none" with a never ending sense that nothing ever gets completed. But it does and your efforts make a difference.
Systems Analyst in Dallas:
"Ask For More."
If a large corporation, understand career paths and job classification levels (Senior, Principal, Director, etc). The level will determine bonus and salary band. The hiring manager can get you the extras if they want you. Once hired, it is harder to get big changes.