Time to get back to it...AGAIN

So I've been slacking which is what I tend to go back and forth to. Over last weekend I ran my first race, a 5k. It went well, I finished. Now that I did that I want to keep going and get stronger and faster. To do that I need to train regularly and star eating a lot better. Training hasn't been to bad I've been running 2-3 times a week, but haven't been strength training at all. Back to the gym! I ran this morning but not as much as I should have, only a mile and a half. At least I did something, I guess. I'm going to work up to running 5 miles a run, but my first goal is to run the whole 3 miles first. Maybe strength training will help me more than I think, too.
My other big focus needs to be food. I like crap food, it sucks. I am logging my food intake and watching amounts of macro nutrients I'm eating. I try to eat 50% carbs, 30% protein, and 20% fat and stay around 1600 calories a day, but may add or decrease. I always feel better when I do this so why is it so hard to follow?