Now start working in earnest to reach your goal. You are charting your own course. Exciting! Now is the time to see if your plan will work, how to improve it, what to edit, and what needs to go.
The best way to do this is to keep a journal, a diary, a record of what you are doing. I hope you have a workout plan before you start. Because that makes things easier. You just note the changes of what you did versus your plan. Example: I ran 15 seconds faster than planned or I did an extra rep on the shoulder press.
These observations will give you clues.
Are the weights I'm using too light or has my form improved. Am I running faster because I changed my training last month? Am I running faster because I am training smarter vs. logging extra miles?
Do I feel better because I am eating better- now that I cut out my 10 Big Gulps a week habit? Or because I am eating more veggies?
You decide what is important.
When I was a dedicated runner and cyclist, I recorded everything! Temperature, what I ate and when, sleep, how I felt before and during workout, heart rate (HR), speed, music I listened to- just to name a few. You get the idea. Nowadays, I just log "my essentials", factors that I have honed after decades of record-keeping the trial and error.
You decide the medium ... Pen to paper? Electronic? Buy a log book? Create your own? Whatever you decide to use is fine.
If you have any questions on this post or any of my previous posts, feel free to reach out to me.