Ask the front desk or concierge CMs at WL for a list of the totem poles and artifacts in the WL lobby and enjoy exploring. You can also go to the Boulder Ridge building next to WL to see some of Walt's backyard railroad train cars in the sitting room on the first floor.
Consider going over to CR and renting a pontoon boat to boat around Seven Seas Lagoon and Bay Lake. We also love going over to Ft. W to visit the stables, kayak/canoe, rent bikes, go for a walk, etc. We always eat QS over there - love the fried chicken. Also consider doing Hoop Dee Doo one night and scheduling a wagon ride post-show. If you visit these resorts prior to 3 pm, you can take a boat to MK and then walk or monorail to CR or take a boat to Ft. W. After 3 pm, you can take a boat to CR and Ft. W directly from WL.
If you do a monorail crawl, consider arriving at Poly around 1:45 pm to get your name on the list for Trader Sam's - the inside lounge is really fun with great effects when people order special drinks (they also serve non-alcoholic drinks/mocktails). The apps are really good too.
If you like pastries and you do a Skyliner tour, highly recommend going to the cafe in the RIV lobby for pastries/desserts and their signature banana-chocolate bread (can also be found in their QS).