OK, which "wiggy" would you all recommend?
Any of the old type heavy solenoid type testers.
The Square D Wiggy, the Knopp or Ideal versions etc.
Personally I like the ones that do have continuity testers built in like wv-wire-wrangler suggested.
With the volt-con you can go up to a an outlet and quickly find out if it is live, dead or even connected back to a panel at all.
Use the continuity checker to test from ground to neutral, if there is no continuity you are not even tied into a panel.