How do I validate all fields on a form are populated when submit button is pressed?

[#1]

I have 35 fields I want to validate are complete when the user presses submit with a warning and a stop to prevent email until complete.

[#2]

I feel I am missing something here, if you make the fields "user entered - required", this will happen for you.  The "user entered - required" option is on the value tab of the object palette.