Be truthful but positive, if your goal is to keep the job and be stable say: To be a good employee with a stable long term employment.
If you wish to be promoted: To excel and gain promotion through hard work.
Change and paraphrase to suit your situation.
A long term goal in one's career would be, getting a raise, retirement, vacation. Short term goals could be, getting one's pay check or a date with some one else in the work area.