I have a Frigidaire oven, model PLEB30T8CCB, that does not heats up. I followed some instructions I found regarding testing the “BAKE ELEMENT,” for continuity (part #67), and found out the continuity to be 18.1 ohms. Does this mean the element is bad, and need replacement? 
Are there other tests I should be doing?
Here are your parts
Replacement parts for FRG PLEB30T8CCB | AppliancePartsPros.com
Here is the tech sheet
http://manuals.frigidaire.com/prodinfo_pdf/Lassomption/318046110.pdf
[COLOR=Blue]the “BAKE ELEMENT,” for continuity, and found out the continuity to be 18.1 ohms. Does this mean the element is bad, and need replacement?[/COLOR]
Spec looks like it should be 19.2 ohms but this is never an exact type measurement, so I would say your element is OK.
[COLOR=Blue]Are there other tests I should be doing?[/COLOR]
If neither element comes on I would check the thermal circuit breaker.