My secret to darkroom efficiency is standardization and read, watch, and ask questions of EXPERIENCED photographers. To elaborate, about 2 1/2 years ago I graduated to an 8x10 camera. That meant contact printing. I acquired some Azo and a B&S contact printing frame. I was using Tri-X and HC-110 at the time and used a Zone VI cold light to expose the Azo. Exposures ran 36 seconds and it took about 1.5-2 minutes to unload/reload the contact printer. THEN I changed my film to TMax400 and Pyrocat-HD. Suddenly my exposures were running 120 seconds. That meant almost 4 minutes just to make a simple proof print. Not too bad if you have 10 negatives, but a real PIA when you have 70 negatives after returning from a photography trip. I obtained a vacuum easel and that greatly reduced the time compared to the contact printing frame. Then I obtained a slightly used "The Cold One" Azo head. That reduced my exposures from 120 seconds to 9 seconds. Then to further reduce my "chore" time in the darkroom, I expose my "proof" prints and store them in a paper safe. When I accumulate enough exposed prints, I head into the darkroom one AM and mix up the amidol and TF-4 and go to work. I set up 4 sets of 2 prints each on the enlarger baseboard. I then develop them two at a time in the Amidol for 2 minutes (Canadian Grade 2 Azo) and as I move the 1st two prints to the fix I reset the clock and put the next pair of prints in the developer. Now, with two prints in the developer and two prints in the fix, I use my left hand (I'm left handed) to agitate the amidol prints while my right hand rocks the fix tray every 10-15 seconds. I repeat this procedure until I have developed all 8 prints and have them all in the fix. Next, I start the fixing timer and agitate through the stack for two minutes. Next step is to give the prints a quick look and then move them to the print washer. This whole procedure is repeated until the print washer is full--30 8x10 prints. Once the prints have been in the washer for an hour they are squeeged and placed on screens to dry. During the wash, I have time to expose some more contact prints, or most likely take a break. After the the prints are on the drying screens the whole process is repeated until I have 72 prints drying (my capacity to dry prints).
Once all of the "proof" prints are dry, they are evaluated for possible "fine print" treatment. Even when doing fine prints, I always seem to have two prints in the developer at once. Most of my fine prints have a base exposure of 9-12 seconds so that is the first pair into the developer. From there I can judge contrast and look for possible areas requiring dodge or burn. I find most "final prints" take me 1-2 hours.
I keep the following variables as consistant as possible, so I don't waste time: Enlarger height, light source, lens and aperature, paper, paper developer, rapid fix, film type, film developer and vacuum easel. Changing any of these variables will result in wasted time associated with additional "testing".
As Fred Picker used to preach, be mechanical and consistant with the mechanical parts of photography. This allows you to be creative with the parts of photography that require creativity i.e. where to put the camera, or getitng the most expressive print you can to convey your message. Don't be creative with film developing or proofing your negatives. Try to think about the mechanical parts of photography as a Micky D's. You want to be as efficient as possible on those areas.