other than being careful of what u say in office, one must also
be careful of what one says to the customers.
never ever promise customers anything unless u are 100% sure it can
be done. if not, the customer will always say, "XXX said it can be
done, i don't care!"
customers don't care whether u are new or don't know anything. once
u promise them something, even if u found out later that in actual
fate it cannot be done, they don't care. they will take advantage
of this and eat u so be careful. 
