Here's a cool short post from the guys at Freakonomics about using data to advocate a viewpoint. You may recognize the name of the purported offender.
Many of you have had econometrics or are now enrolled in 422 (others will have me for 422 next spring), so hopefully if you can't relate to this, you soon will. People want answers. Analysts included. During tumultuous economic times this is especially so. Our job as economists is to seek those answers, find the truth, whatever it may be, and report it as objectively as possible. But many times the truth is "we don't know". People (especially those paying for analysis) don't seem to like that answer, which can create unfortunate pressures that can lead to tenuous conclusions.
Hopefully this class has increased your awareness that economics is messy, and "one size fits all" solutions are very rare.
For your work, be open about what you know, what you don't know, and what your assumptions are. When reading the work of others, question assumptions, check the data and always know your sources.
Thanks to RH for the link.