The following steps would hopefully help:
1) Peruse quora.com every day, read the wall street journal, if you don't have a subscription you can get one online and read any journal.
2) Network and attend conferences that interest you.
3) Focus on an area that you have passion about and keep it simple.
4) Possible paths to explore beyond social media are:
a) Ecosystem driven where there is demand i.e. Salesforce, Twilio, Google App Marketplace
b) Healthcare
c) Personalized Medicine
d) Energy
5) Build a prototype(balsamiq) and develop a pitch.
6) Participate in business plan competitions.
7) Get going.