eBay may have been the hottest tech company of the last millennium--traffic has been eroding for years now--but it's still big enough to merit the 21st spot among the most trafficked Websites in the world, per Alexa. Business opportunities in the auction field remain as varied as the items for sale on the site. Troll garage sales and storage-center forfeiture sales for buried treasure, and then relist the items at auction. Make your own quilts and offer them up on eBay (or, better yet, on Etsy). Or set up shop helping people who would otherwise be putting their unwanted merchandise out on the street make a few bucks by selling it online. eBay's mobile app for iPhone, Android, or BlackBerry makes managing storefronts easy from anywhere.
7. Life Coach
Ah, the beauty of the life coach: You need no real credentials, no degree, and no special business license to give people your opinion on how they should run their lives. Throw together a Website touting your expertise--in the life-coach world, the more outrageous the design, the better--get some testimonials from people friendly to your cause, and write up a few stories that show off how wise and intelligent you are (something like "Seven steps to a more serene id"). Once the clients come calling, you can book appointments for in-person meetings or, better yet, telephone calls. Charge premium rates or monthly retainers for folks who'd like 24/7 attention. You're on your own, however, when it comes to actually dealing with all these crazies.
8. Virtual Assistant
Who doesn't need a little helping hand from time to time? Virtual assistants let people with too much on their plate outsource the most menial tasks to a peon. That's you! Exactly what you do is up to you and your client, but the most successful virtual assistants are the ones who will do just about anything that falls even remotely within the letter of the law. Realistically you'll be buying event tickets, researching vacations, fetching dry cleaning, and even dogsitting from time to time, but requests can run the gamut from the mundane to the extravagant. Be clear about your fee structure--most assistants bill hourly plus expenses, or offer prepackaged monthly deals for a set number of tasks--and promote the heck out of yourself. Entrepreneur magazine has several ideas along these lines to get you going.
9. Tech Support