Technology has come so far and is another tool to help you in your fitness journey. There are so many apps out there designed specfically for fitness! Whether you need something that tracks your workouts, meals, or gives you ideas for new workouts there's an app for that ;)
My Fitness Pal:
Great for tracking food, I love that they have a lot of different stuff on there. I don't log mine everyday anymore, but I did when I first started just to get an idea of the kinds of foods I was eating, what was too much/too little etc. My only beef is that it said I should only have 1200 calories a day, when my RMR (resting metabolic rate, which is the amount of calories I need to eat just to run my body and not even factoring in moveing) is over 1400.
Couch to 5K:
One of my best friends used this and absolutely loved it. They have couch to 10km and couch to half marathon. These are awesome if you're new to running or need a schedule
I love this one because it personalizes workouts for you, you give it a goal, whether it's at home/gym/away, your time limit, the type of equipment you available to use etc. It's pretty cool, you can choose body parts to work on and it gives you circiuts to do!
This app has trackers you can sync with it but you can also use it without having them, it's similar to my fitness pal but allows you to build meal plans which is nifty!
These are great because they give you something to be accountable to. I know theres a ton of people who eat differently (usually healthier) if they know they have to write it down. Most of these apps are free so try something new to challange yourself and your fitness :) Also theres so many different ones out there, so if none of these work for you it doesn't mean there isn't one out there, keep trying!