I have found that having a prepared exercise plan that can be repeated regularly at the same place and time with minimal variation soon makes your exercise commitment a habit, a bit like brushing your teeth every morning.
I perform a regular set of core strength and cardio exercises that i have been progressively improving my strength and fitness around for years. I have made the gym a habit each morning on the way to the office. It is hard to imagine not doing this each day.
I tried a few time to go to the gym at a later time of the day, It did not work. I could not settle my mind and be focused on the training. The change in time meant i felt different and the environment was different, as simple as the position of the sun in the sky and the different patrons using the gym at that time of the day upset me. I even have found i can not perform as well if the gym equipment is moved around the gym, i need the consistency right down to the place i am standing when i lift.
I tried using a different gym when i traveled, also no good. It might be OK for a light workout or cardio but in strength training unless you are going for gains you are largely wasting your time.
So my advice would be to find a time you can generally always make your fitness time. Also have a routine set of exercises you can workout on and work to improve on as your challenge, this will also help to keep you from getting bored. Keep reminding yourself your fitness is important, give it value and make it a habit I rate the three most important things in my life with three F's:
Family =1
Fitness =2
Fortune =3  |