As I mentioned in the beginning, there is no right way to use Evernote. 10 different productivity experts use it 10 different ways.
Some things you can do in real estate include:
Photo/Document Storage
Transaction Management
Marketing/Distribution
Expenses
Content Curation
A great resource if you want to ramp up your Evernote use is Dean Ouellette's Evernote For Real Estate. It is available at
http://productivityagent.com/evernote-for-real-estate/