I have Evernote on my computer/smartphone, and I made a notebook there to keep track of what I do. I like it because I can just put the data in my phone as soon as I'm done working out, and Evernote automatically synchs it with my computer at home. And if I want to take a picture of something (like my coach showing proper form), I can take the pic with my phone and put it right in that Evernote notebook.
Then at home I can look at that notebook on my computer, and add things if I want, or plan out my next workout, and it will synch back to my phone.
*Small advert for Evernote: it's a nice, simple software that lets you create (and share if you want) notebooks, and it automatically synchs smartphone and computer. Besides my workouts, I keep my shopping list in a notebook, and a list of what fruit/veg should be bought organic, etc. End advert.* And no, I don't work for them or get paid by them!
You make your choices, and you live with them. In the end, you are those choices.
"Strength is the mental and physical fortitude to endure, resilience to bounce back, and force to create change, allowing you to thrive in any circumstance and through any adversity." TrPAssassin