Not sure if AK is much different for a solo traveler than a group. And it can be different depending on your tastes.
1. My top rides are Flight of Passage, Kilimanjaro Safaris, and Expedition Everest. If you've never done Dinosaur that's a solid ride as well. Tough to Be a Bug is a cute show if the line is short (just be prepared for some people to leave with screaming toddlers midway--the show can be a little scary for little ones)
2. I like the walk through animal trails as well, which people tend to skip in favor of rides.
3. We (personally) felt Tiffin's table service was overrated, and prefer to go to the lounge instead of the restaurant--ask your server about the $1 mini banners you can sign that get hung up over the bar ($$ goes to Disney Conservation Fund).
4. Kite Tails shows have mixed reviews, but the shows are free, happen all day and you don't have to fight for a seat.
5. Flame Tree BBQ and Sa'tuli Canteen are fan favorites for food in the park, but AK has LOTS of very fun snacks.
6. Check out Pandora after the sun goes down. Right before closing is also a good time to get in line for Flight of Passage if you don't want to waste "open hours" time in that looong line (as long as you get in line before closing time).
7. If you have time to check out some of the carvings up close on the Tree of Life, they are kind of amazing!
Just a few quick tips, but find something that looks like fun and go for it!