Map My Fitness is one of the apps that I use the most.
I track each workout with it and it helps me to look back at my progress as well as allowing my trainer to see what I have been up to on my days away from the gym. The blog site on their website is full of great info. This post is super great. I try to combine tasks if I can. I can’t walk and text, ask my kids, but multi-tasking is important in getting things done.
We walk, a lot. We have some super trails right out our front door or a short car ride away. If I am walking alone, I try to make lists, solve the world’s problems, or at least write blog posts in my mind. However, learning while walking is so great. I look forward to logging in to some of the podcasts that I haven't’ experienced yet.
http://www.mapmyfitness.com/blog/8-podcasts-to-listen-to-while-walking-6041/