I just got back from a month-long road trip and was able to add a couple states as well as spend more time in some I'd been to before. I found a really nice mapmaker that lets you choose the level of "visiting" you've done in a state; so, like, if I've only been to a state because my flight stopped over there, it doesn't get ranked as high as a state where I've stayed weeks or more.
EDIT: Whoops. I got Mississippi and Alabama mixed up... I've spent more time in AL than MS.https://www.gasfoodnolodging.com/visitedstates/coral
for states where you've not spent much time or seen very much.orange
for states where you've at least slept and seen some sights.blue-ish
for states you've spent a lot of time in or seen a fair amount of.green
for states you've spent a great deal of time in on multiple visits.