PR a Strength-Training Exercise
If you're already doing some strength training, 2018 is a great year to take it to the next level. Pick an exercise you feel safe in (bicep curls or lunges with dumbbells at your sides are great for beginners), and find your baseline by seeing how much weight you can hold for three sets of 10. With two to three workouts per week incorporating your exercise of choice, you should be able to add some weight each week until you're reaching for a dumbbell you've never used before. That's a good feeling.