Tips for reducing set-up time?

Person doing the setup has to choose to minimize what gets done. When in traveling mode, I may level as I park (I don't have jacks to mess with), hook up electricity only, run out only one of the two slideouts (bedroom). I don't haul out camping or recreational equipment, and since I don't watch TV, no need to mess with antenna or satellite stuff. Less than 15 minutes. If I do a water hookup too, that does not add more than three minutes.

Leaving sometimes takes a little longer, have to put away the stuff we got out inside.

If I cook outside, getting out that equipment isn't part of setup, it is part of cooking, and gets put away after, rather than leaving it out until morning.

Even when staying 3-4 days in one place, I don't have more than 30 minutes of things to do before considering myself set up. But I understand your situation, we go RVing with at least a couple guys who will take more than an hour to do pretty much the same things.

If it's just for an overnight, you definitely should not be doing any "setting up" period. Pull in, stay connected, hookup electrical, put slides out, sleep you're done.

How in heck can it take an hour and a half? When I get to a campsite as I usually arrive ahead of the wife, it may take 15-25 minutes to back in, level, hook up water, electricity, sewer, deploy awnings' set out chairs, raise the antenna and start the tv scan.

The idea of a checklist/routine is a good one. You might consider shortening the travel time so you're not so tired at the end of the day.

I make sure that levelers, chocks, hose and electrical are readily accessible so I'm not digging around at set up time.

I can see no way one can spend that much time setting up and then returning to travel.
If I'm overnighting in a park I pull into the site, engage the jacks to level, walk outside and check the shorepower and connection and plug in. Hook up a hose for water and that just can't take over 10 to 15 minutes top. I never hook up the sewer for an overnight stay.
Hooking up the sewer is another 3 to 5 minutes, I use a sewer solution setup which is much faster than a stinky slinky. But even the slinky is not a big deal unless you insist on putting the little tressel to hold it off the ground. Going back to travel is even faster, 10 minutes tops. That said, I'm not all that agile on my feet and so others can do the same much quicker than I.
Now if you spending days in a site, the amount of stuff you pull out for comfort will add to the time. Lawn chairs, awning lights, leds for the ground, patio cover, folding table, bar-b-q, propane bottle, bikes, lighted palm trees, potted plants all take a lot of time and many feel that they need all of those homey things for their experience...after 10 years of fulltime, I have a bar-b-q, ground cloth, two lawn chairs.

We found the best thing to do is have a check list that has been refined multiple times to get the sequence in place. Then, divide the tasks that need to be done.