I thought I was organized, but Bev's got me beat.
I have 4, 6 and 8 inch clay pots, my soil is mixed and I have 10 nursary trays for transporting. I think they hold 18, 3" squares. I better check to see how many 4" clay pots fit on each. I suspect I'll be starting with 4", maybe a 6" pot for any big guys.
When I recieve new plants, I always do the same thing for everyone. Basically what Lynn described above. After acclimated though, the all get to try out the 3 different areas and I can see where they're happiest. I love that part! And, most will be moved to a bed or one of my "rock pots".