Our laptop computer has been a good traveling companion. Many commercial campgrounds offer free wireless internet. Panera Bread usually offers free Wi-Fi also. Sometimes it's possible to connect from their parking lot even after they close. MSN's Wi-Fi hotspot locator http://hotspot.msn.com/web/SearchView.aspx
maps out free or pay Wi-Fi access locations.
For those of use without mapping software, Google Maps will provide point to point directions that are usually good.
Virtual Tourist sometimes has good recommendations for things to see and places at which to eat. http://www.virtualtourist.com/
Gas Buddy http://www.gasbuddy.com/GB_StateList.aspx
can often locate the most economical place to fuel up.
Our local library offers a huge assortment of audio books for download.
We downloaded several books using campground Wi-Fi.
When travelling without the trailer, we used Priceline and Biddingfortravel
to find hotel and motel discounts. With the laptop and Wi-Fi we could book a room the same day we arrived in a location, and save considerably over normal rates.