Updated: July 27, 2015
Build a Matchmaker (updated & expanded)
Computers are great for finding common interests between people. You will learn how to build your own website that matches people based off interests and questionnaires. We'll implement a subscription model (SaaS) on this one.
This is how billion dollar sites like Match and OkCupid were built...this one is adapting the same idea to a job site, it could be the start for your own recruiting empire.
Create a Geolocator (It's Happy Hour Time)
Build a web-based app to help find local restaurant happy hours for food/drinks. We will build a geo-locating service using Foursquare's API/Data and Google Maps.
Hint: you could use the landing page created in step 1 ascertain interest in an app like that this to test whether or not this in itself could be a business.