CCW clothing choices
Dress to fit in with the environment you're in, and nobody will know the difference.
Where I live, wearing Royal Robbins or 5.11 pants makes people think you're a hiker or backpacker.
The 5.11 vest with the big pouches on the front for a 30 round M-16 mag do stand out, and I just use mine for practicing from concealment at the range.
If you want a photojournalist type vest that is not as obvious, check out Orvis or Filson or Dulth Trading Company.
This summer I think I'm going to get a Hawaiian type shirt, cut extra long, to help conceal little guns in an IWB holster.
The posters who have made the point that you can sometimes detect a CCW permit holder or off duty cop because they are obviously scanning the environment and have good situational awareness is very true. HOWEVER, many of my co-workers at the PD don't seem to have that much situational awareness when they're on duty