Unless you know better, stay the good course you're on. There can be many distractors to the life course you've chosen, and it's good to give those distractions some attention, but unless there's a good reason to get distracted and change course, I think it's best to stay the course you have chosen.
What kinds of distractions can justly take you off course?
Unexpected personal needs
Unexpected personal needs related to health and happiness may occur. If that happens, you'll have to make some adjustments to the course you're taking.
Friend or family needs
Perhaps a friend or family member needs you. If you care deeply about those people, you'll likely make some changes to your routine in order to help out.
A better opportunity
At times, better opportunities may arise that cause you to change course. Yet, you have to be careful that you don't change course too quickly because a new opportunity looks better. Do your research first to make sure that opportunity is not better.
There are reasons why you shouldn't change course too. I remember a long time ago when I was on a very good course, and I let a supposed expert urge me to change course. That "expert" actually destroyed the success I had achieved since she didn't take the time to get to know me and understand where I was coming from. It was a big mistake for me to trust this person simply because she had an expert title. I should have considered her advice in relation to the success I had achieved in that arena--that kind of consideration would have kept me on course while dismissing the "expert's" advice.
Also, sometimes people will not support a positive course you're on, and they may try to subtly or directly push you off course. This often happens when people are making significant lifestyle changes that make their life ways different from those of close friends or family members. A simple example of this is when people are making dietary changes--often, those unfamiliar with those dietary changes may not accept the changes and continue to prepare or offer foods that people have chosen not to eat.
And, a lack of conviction or confidence can move you off course. If you're working for a challenging goal, you may not believe that you can do it, and that lack of confidence results in a lack of commitment to the goal. You've got to make sure you use a lot of positive self talk to stay on course if the course is challenging or different than what you or your family is used to.
If you choose the course well, stay the course. Don't let a lack of confidence, support, or what seems like better opportunities move you away from what you know is right and good for you. Do give yourself permission to deviate from the course if critical personal or familial needs arise or if a truly better opportunity comes your way. In most cases, however, staying the course when your choice is thoughtful and well-directed is the right thing to do.