I will start by sharing one of my favorite trips:
Without much planning, I loaded my car up with non-perishable foods (bread, rice, noodles, cookies, etc), some camping gear including the homemade alcohol stove I made a week before, and headed westward to explore some of the best scenic destinations that the U.S. has to offer in the Dakotas, Montana and Wyoming. I lived out of my car and on foot for two weeks, only stopping for gas and road maps when I had to. There was so much to explore and I felt that I didn't even scratch the surface out there.
If you have never done anything like that before, and you have the means to, give it some consideration. While it was only two weeks for me, living with only the bare minimum items to keep yourself fed, sheltered and "warm" (minus the warm car drives, I suppose) can really open your mind up for reflection on the things that really matter in life to you. Removing yourself from TV, internet, cell phones and traffic could be just what you need for yourself, if you so desire. For me, it was an amazing experience that I will never forget, and I still think about it often as I gaze out the window, trapped inside, doing my daily routine.
Does anyone else have a travel experience they would like to share?