Drop your opinions at work? When I am supposed to simply observe my thoughts and any opinions that arise from them, and not cling to them, how am I supposed to work? I have a job, and as such you cannot not have opinions. It becomes a loss of self. I could let go, but then why should I go to work and exercise my effort on doing something other than simply meditate 

Could someone help out with this conflict?
You don't necessarily have to abandon your opinions. The important thing is to recognize that opinions come from conditions, and those conditions always change. Your work is one of the conditions, and it's appropriate to form an opinion for those conditions... and then be ready to change the opinions if the conditions change, or if the opinion doesn't apply in a new situation.

Like the previous commenter said, this is a 'sila' practice, rather than meditation - examining your everyday behaviour to see if it's skillful. It's probably impossible to do vipassana at work!