Reddit reviews Gardner Bender GSP-24 24 Piece Switch and Receptacle Spacers, Red

Here ya go

Slap a couple of those bad boys on the screws behind the receptacle/switch and you'll have lovely looking and flush outlets in no time.

No time = a lot of time when doing every outlet in the house

Get a bag of these from Amazon or the orange/blue stores:

http://www.amazon.com/Gardner-Bender-GSP-24-Twist-apart-Spacers/dp/B00ATOYNA0

Use them like this: http://toolmonger.com/2009/06/17/hands-on-caterpillars-fix-wiggly-outlets-once-and-for-all/

Now, if there's a considerable gap, the correct solution is to use a box extender:

http://ace.imageg.net/graphics/product_images/pACE3-979929enh-z7.jpg

Get a bag of these from Amazon or the orange/blue stores:

http://www.amazon.com/Gardner-Bender-GSP-24-Twist-apart-Spacers/dp/B00ATOYNA0

Use them like this: http://toolmonger.com/2009/06/17/hands-on-caterpillars-fix-wiggly-outlets-once-and-for-all/

Now, if there's a considerable gap, the correct solution is to use a box extender:

http://ace.imageg.net/graphics/product_images/pACE3-979929enh-z7.jpg

Also: http://www.erico.com/category.asp?category=R1154

Ah, gotcha. Shims is it, then!