Good eating can become a habit and you just start to get away from processed foods that are pretty bad.
A good plan is to try to get as much from natural foods (stuff not in boxes, bags or cans) and it is cheaper. Drink water instead of sodas etc. etc.
Finally, on W/Os, and there are many proven routines as written, that you can follow almost mindlessly and do not have to worry about programming or anything else but execution of the sets and reps. That way, you just get to the gym regularly (the hardest part) and follow the template, using the largest compound exercises ie: squats, deadlifts, chins/rows, OHP's, BP's, some arm work and abs thrown in. That completes the best set ups for the most bang for your training buck. You see some progress and that is the best motivation to keep at it and get more and more disciplined. Many supplements are overrated and will do nowhere near what hard work and good reg food will do .
Bottom line and magic secret is..., what are you willing to do in the gym & the kitchen, to get the best from the W/O's and thus what you want???