[SalesForce] How to add a new contact using Salesforce1 mobile app

You create them via Chatter Publisher Actions - make sure Enable Publisher Actions is checked in Chatter Settings, and then that the actions you want (e.g. New Account) is added to the Global Publisher Layout under the Chatter Settings.

If so, you should see the new option when you click the + button on the bottom right of the screen (it can take a little while to appear on the app, but if you go to one/one.app you should see it immediately)

I was having the issue where the Detail Link in the email template was just taking me to the contact summary on SF1. In using the link from RichClark it worked for me. I just changed it to point to the contact detail page like this...

com.salesforce.salesforce1://entity/view?entityId={!Contact.Id}