Most days my I figure out my running route before I head out the door. I will choose a route based on the mileage I intend to do that day and based on where I ran the previous day as I try not to use the same route on consecutive days.
Today I decided to try something different. I was planning to run for 1-2 hours but I did not give any thought to the route I would use nor to my intended mileage before I headed out the door. I ended up deciding where to go along the way based on the conditions and how far I was from home.
It worked out well for me as I finished with 20 km in 1:44. Have a look at my latest run in the sidebar if you want to see where my run took me today.