Hi, yes! I recentantly started keeping a journal and it's help me collect my thoughts and make changes on certain things when i go back and read though it about how i feel after i work out.. It's help me be sure of my progress and i recommend for everyone to do it! I usually put what i did (elliptical, weights, etc) and for how long.. then i record how i'm feeling and my progress!
If you think of anything else to put in your journal... what you ate/drank afterwards, what your did..FEEL FREE..the more the merry! Hope i helped!