productively
In a way that gets useful, important work done.
Productively means doing something in a way that gets worthwhile results or creates something valuable. When you work productively, you accomplish something that matters through focused effort and effective methods.
Think about the difference between spending an hour doodling random shapes versus spending an hour sketching ideas for a story you're writing. Both involve drawing, but only one uses your time productively. Or consider studying for a test: you could read the same page over and over while daydreaming, or you could actively take notes and quiz yourself. The second approach is studying productively because you're actually learning the material.
The word comes from productive, which means creating or achieving useful results. A productive day at school isn't necessarily the easiest or most fun day, but it's one where you learned something new or completed important work.
People sometimes confuse being busy with being productive. You might spend three hours “working” on homework while texting friends and watching videos, but you'd accomplish far more by working productively for just one focused hour. When you use your time and energy productively, you get the satisfaction of seeing real progress toward your goals.