Kahului, the main city center is not an exceptionally unique Maui town, but it is a good center for living must-haves: Costco, Barnes and Noble, Krispy Kreme and the biggest mall on the island.
But there are other stops to explore:
Tasaka Guri Guri (Maui Mall stripmall) - the best homemade ice treat on all the islands
Maui Film Festival: June 17-21 (Maui Community Cultural Arts Center) - a great way to catch some well made films
Typically my usual Kahului stops include:
Starbucks at the mall - multiple outlets for laptop work by the window and comfi chairs.
Food Court at the mall - indoor eatery under glass roof; quick, easy and convenient
Airport - can't get anywhere without this joint
Macy's - the main department store on the island
Borders Bookstore - small but they'll get you what you need (even if it has to be shipped)
Krispy Kreme - a stop right before the airport (take back donuts to friends/family on Oahu)
Costco - after your flight arrival to the island pick up your goodies (on the way to Kihei, etc)
Bark Avenue - best couture pet store in all the Hawaiian islands. love the maui branch even over the hawaii kai branch.
Where's it at:
Maui Arts & Cultural Center One Cameron Way, Kahului, HI 96732
808.242.2787
Alexander & Baldwin Sugar Museum 3957 Hansen Road, Puunene, Maui, HI 96784
808.871.8058