I start with grade 2 and an educated guess as to the proper exposure. I always use a metronome when printing. After I've pinned down the highlights, I judge contrast and then make the decision which way to adjust it and by how much. I use Michael Smith's "outflanking" approach in tweaking all variables, which not only tells me the optimal overall exposure quickly but gives me most of the dodging and burning information along the way. This technique enables me to arrive at the print I want using the fewest sheets of paper, almost never more than 5. Furthermore, once I have the times down for a given negative, the prints are repeatably identical no matter how many I'm printing. This method applies to enlargements as well as contact prints, and on any paper no matter what I develop it in.