My hybrid has what I think are probably cyclocross tyres (off-road but narrow), and I occasionally take it around a "medium mountain-bike" trail (it's really more of a path through some nice woodland, but it is the closest thing around here and lots of fun). Road cycling is easier in that respect as it doesn't involve any travelling and saves time (having both a child and a job makes that essential).
My last ride on the road bike was much easier than previously. I feel steadier on the bike. I think it took some time getting used to how much lighter it is than my hybrid. It has been fun trying out some of the advice (in particular cadence, gears, not looking at the pot-holes etc) from the thread and the links.
I tried my first super-sprint triathlon late this summer, and found to my surprise that it was the biking, not the swimming, that was my biggest struggle. This inspired me to buy a roadbike (which I am happy with and I think fits me well) and I have started to add 1-2 gentle bike-sessions a week for enjoyment and to get more exercise without running more.
I'm finding that I can't yet take full advantage of my lovely new bike! I've cycled a lot in my life, but the new bike is just very different from my old hybrid which was used for transportation and days out. I'm looking for advice/videos/books/websites that can help me learn the actual technical bits of road-cycling. So far I've only found advice on bikes/bike care, equipment, how to cycle in traffic and serious bike training. I'm cycling on lanes with minimal traffic and gentle hills.
What I'm hoping to learn is more about what other people might find simple, such as when to use the bars and when to drop down (or whatever it is called), how to lean when going around corners, how to pedal more effectively, how to look behind me without suddenly finding myself on the other side of the road, which gears to use etc.