One of the best ways to gain motivation is to keep track of your progress, but with varying types of training sessions and activities this might not always be that easy. One way of doing this is to make your own test track. I did this two days ago.
This is it, my test track. It's about 8k long and consists of only gravel roads following the river southward. It's a good distance to check both my endurance and my conditioning as well as being relatively straight and easy to run.
I ran this Monday, not really being able to push my body to the extent I wanted to, because of way too much food being consumed just minutes before the run. Not a smart decision, I must admit. The entire run was abysmal, with constant burps and stomach pains, but I managed to get through it, setting a very beatable time. My average pace was roughly 4.30 minutes per kilometer and I am sure that I'll improve greatly already next time. I wasn't even close to pushing myself to the max and only got my pulse up to 175 BPM at the highest.
It seems like I am a bit disappointed with my run, and I could say that to some extent I am. But I can also see progress as I was getting several new PRs on Strava without really pushing it too much. This could be a good sign for the many runs to come.