How do you make a plan and stick to it?

I’m currently in high school. F, 5’8, and about 149 pounds. I’m ok with where I’m at, but I’d still like to lose some weight. I lift weights 4 times a week, and I’ve gained some muscle, so I want to lose some fat to be toned. Besides weight lifting, I’m not active. I think that my main problem lies with eating, as I snack a lot after school. I’ve tried to cut out snacks but I’m not very disciplined. Any tips?

submitted by /u/akadumpsterfire
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source https://www.reddit.com/r/loseit/comments/ucsgkn/how_do_you_make_a_plan_and_stick_to_it/