You can't speed up the process, you can however help it to develop by eating healthy, being patient, doing excersices (Just stay active helps it due to the adrenaline etc) but most important - Be patient.

I don't believe minoxidil, rogaine etc changes the way your genes work - It only helps what you already got imo.

* Always give yourself at least 24 hours
before shaving or trimming your beard.
Check out all tips at the Rules of Beard Acquisition