Auto Populating a Field on New Entity Form.

Upon clicking the "+NEW" button to access the Create New Entity Form, how can I pre-populate fields upon accessing this form.  

I have a field "Owner(Sales)" that has Data Type = Owner.  Which seems pre-populate upon entering the form.  I want to replicate this feature for 2 other fields, where the field gets set to the current user as well.  Unfortunately, I believe that you can only have 1 Field per entity that can be set to Data Type = Owner.  Any ideas on how I can replicate pre populating fields upon entering a new form?  

Thanks ahead of time!