The Smell Identification Test is a comprehensive test that includes 40 different aromas. It is reportedly the most reliable with the correlation between the test and retest = .94.
Many folks have made it fun by trying it in a family round-robin to see whose smeller is working best. I don’t think mine is too good, but we’re going to try it in the family sometime soon to see how we do.
The Administration Manual is recommended for first-time purchasers.