Most US state articles are in terrible shape, many have only 1 or 2 references and they continually receive vandalism. You can help out by adopting your state. Just add it to your watchlist and at the minimum watch for vandalism.
You can also:
Add References (most important!) - Most references on any given state can be found for other states so check well references articles such as
Minnesota for ideas.
Do Fact checking
Become a managing editor - A state article is a lot to write. See if you can find other editors to maintain certain sections.
Remove spurious or questionable nonsense. Favorite "history", facts of questionable usefulness or truth, outright trivia, etc. should be checked out.