A few years back, I had some free sessions with a personal trainer at my gym, and one of the most useful takeaways was this:
Unless you write stuff down, it’s too easy to “fudge the facts” in your mind.  How much pushups are you doing with good form?  What are you eating each day?  We tend to maximize the former, minimize the latter, and that’s not good.

For starters, he made me write down each day *everything* I ate and drank, along with estimated calories associated with each thing I put in my mouth.  Boy, that was a depressing but enlightening shocker!

Well, I decided to go one better and start my own personal health chart (in Excel), daily noting my progress on several fronts (weight, body fat percentage, pushups, etc.).  Alas, after a few months, that kinda fell by the wayside, so I picked it up again a year later.  And, once again, that only lasted a few months. 

I’m trying yet again, and—now that I have the regular routine of a full-time job—I’m hoping it’ll somehow be easier to keep up the list.  For the very curious, I’ve included below exactly what I’m measuring: