As you can tell from my user name, I'm all about the food so any info I have about Maui is mostly food advice. I'm an Oahu resident that visits Maui every so many years, but my mom & sister go annually. PP mentioned food trucks so here's a few that we visit: Ogo, Thai Mee Up, Maui Fresh Streatery, Peace Love Shave Ice, Gus Hawaiian Shave Ice. Restaurants: Pita Paradise, 808 Deli, Humble Market Kitchin, Poi By the Pound, Tin Roof Maui, Paia Fish Market, Cafe O'Lei, Leoda's, Ulupalakua Ranch Store & Grill. Favorite snacks/take home goodies: Tasaka Guri Guri, Stillwell's Bakery (cream horns!!), Hula Cookies & Ice Cream, Maui Pie, Maui Bread, Surfing Goat Dairy, Maui Specialty Chocolates, Sweet Paradise Chocolatier.
I also feel that Maui Ocean Center is the best aquarium in the state.
We also enjoy the Maui Swap Meet on Saturdays that is scheduled to restart on June 12, per their FB page. Lots of vendors featuring locally made products.
We'll be there in July & hopefully have more info.