The night before last I needed to make some 11x14s on a paper that I hadn't used for years. I had no idea what the dry-down charicteristics were and I didn't want to get up the next morning and find everything that I did in the session was either too dark or too light, (from over compensation).
Luckily, I happened to remember that a few folks in the APUG forums had mentioned using a microwave oven to quickly dry test strips as a method to preview dry-down. I tried it and it worked great! A minute of nuking the strip and I was able to print with an accurate preview of it's dry tone in hand.
I don't remember the specific individuals who have mentioned it so I'll just thank APUG as a whole. What a great resource!