I have to admit, I started reading this thread thinking, "Who are these crazy people who MAKE yogurt?"

Now I want to try it!
DH has started eating a lot of Greek yogurt (I already ate it occasionally), and DD7 eats regular yogurt pretty much every day. I think I spent at least $20 on yogurt in the last 2 weeks! Crossing my fingers that it's really as easy as you all make it sound!
How do you take the temp of the milk? Candy thermometer?
I'm going to post exactly what I do....it seems like a lot of steps, but it really takes no time. I use a digital food thermometer...instant read type. One I already had. No reason that a candy thermometer wouldn't work.
(1) Heat milk in glass bowl in microwave (I use a pfalsgraff two quart crock). I fill the crock nearly full...about 1/2 gallon. Heat milk to 180 degrees. In my microwave (1200 watts), this takes 16 min, 45 seconds. (You can also heat on the stove, but you must watch it carefully so it doesn't burn).
(2) Cool milk on countertop until it is between 105-110 degrees. This takes 45-60 minutes, depending on the ambient temperature of my house. About 5 minutes before the milk has cooled to proper temp, turn on oven to 170 degrees (or warm setting).
(3) When milk reaches proper temp, whisk in 2 Tablespoons of plain yogurt (no more....more is not better) into the milk. Cover container with lid, and cover with dish towel for added insulation. The first time you will need to buy a small container of yogurt for your starter. Make sure it has "live and active" cultures written somewhere on the label. After you are making your own, just make sure to save 2 T to use in your next batch. Some say you need to get "fresh" starter every six months. I'm going on 9 with my batch, and I detect no difference in taste or performance.
(4) Turn OFF oven, and turn ON oven light. (Note: I have two ovens...the one with one light in the oven works perfect...the other....with two lights...is too warm, so I removed one light from this oven). Put covered contained in oven. LEAVE IT ALONE for 6-8 hours. I find about 7 to be ideal.
(5) Remove crock from oven, and move to refrigerator for a minimum of 3 hours. After it has cooled (if you like greek style), pour the yogurt into a cheesecloth lined colandar and let drain over a large bowl for 2-3 hours. I use a thin burp cloth instead of 3-4 layers of cheesecloth...much easier to work with and works fine! The large bowl will capture the whey, which I throw out, but your real crunchy types will use this to make bread or soup. I drain mine on the counter in the kitchen.
Now you have yogurt. It really is easy. You can use any kind of milk you like...skim, 1%, 2%, full fat. I use 1% and making it greek style it is super creamy and rich tasting.