... Do the cool route Northern Arizona drive! (take your camera)
... Take off north on I-17, past Camp Verde turn off to Sedona. Stop and eat at Oaxaca Restaurante & Cantina there, be sure to have a couple margaritas. Stroll through Tlaquepaque to work off some of the enchiladas. Head up Oak Creek Canyon stopping somewhere past the campgrounds to wade into the water for a spell. Continue north on 89A up the switchbacks to Flagstaff. Secure a room at Little America Hotel then head into old town. Hit Beaver Street Brewery & Whistle Stop Cafe 11 for a few Railhead Red Ales. If you have a few days you must hit the Grand Canyon, I could type a whole other thread about that, but lets assume you don’t.
In the morning take a drive up to Arizona Snowbowl and take a lift to the top of the mountain, now there's a way to see the State!
On your way down off the San Francisco Peaks, stop off at Museum of Northern Arizona and really get a eyeful of Arizona history and culture. If staying another night, you might try dinner at Black Barts Steak House Saloon & Musical Revue, it's pretty neat and they BBQ's great steaks. Head over to the Museum Club for a nightcap. In the morning if you have interest head east about 40 miles to Meteor Crater if that stuff interests you. (got to see it once, got a fair museums there too)
Head back towards Flagstaff, if you’re still early check out Walnut Canyon; has some very interesting Indian ruins you can actually walk amongst.
Just before town turn south towards Lake Mary and Mormon Lake. Meander down the beautiful drive to Strawberry. Stretch your legs there and look around, it’s cool. Continue south to Payson and on down to Mesa / Phoenix.
There are literally thousands of way cool spots to hit but that is a great two day route.