My break in process is also just to practice. I do usually put some tire conditioner on the first couple runs to help burn off the mold release agent that is usually stuck on the tires. Lately that has been WD40. Wiped on with a rag or using a toothbrush. I usually break in a set of tires in practice then set them aside for race day when they are good and ready but not worn. This also makes me a better driver as I learn to drive when it's on "ice"

It should be noted that you shouldn't make setup changes during this break in period as the traction will generally be drastically different. However, some tires work really well out of the box. Typos and Ions seem to be this way, pretty good out of the package and when they break in they are really good. I need a set of rear dirt webs and I'll be able to do some testing of these versus Typos and Ions.