Setting resolutions for running is a good idea, but setting up a more specific plan for improvement is even better. Is 2020 the year for going faster, running further or trying a new recovery? Those goals are easier to achieve with some planning.
Getting a little bit faster is possible for almost all of us. One of the best ways to improve speed is to incorporate speed work and interval training into one or two workouts each week. Timed intervals can be set up on smartphones or watches; there are free phone apps, such as Seconds, that make setting up intervals easy.