Well, here you are on a writing site. Why not try writing? You have a wealth of experience that could benefit others. Publish your recipes, your parenting tips, your advice for brand-new Navy wives, etc. The more you're in the habit, the more you'll start to discover what excites you, and you may find yourself with a new hobby or interest.
Offline, connect with your community. Get together for regular coffee dates with friends, volunteer at a local organization, start a book group or crafting group. Join a gym and try out some outlandish fitness classes, just for fun. Get out of the house and see other people!