How to ask for Testosterone tests

Hi Mark,

I'm 36 and have never tested my T levels. I've never felt symptoms or felt the need to, but now that I'm getting older and focusing on my health and muscle building, I'm thinking it would be good to have a baseline from which to periodically compare against. What specific tests should I ask for when I visit my Endocrinologist? Also, if T levels rise and fall during the day is it even possible to feel confident in its accuracy?