Open the PDF form in PDF Viewer Plus or Power PDF.
Use the Select Text 
tool to add highlights or underlines to static form text.
Use the Text Box 
tool if you need to add new static text to the form.
Add comments and notes if you need to review the form with colleagues before distributing it.
Finish reviewing the form design, modify it as required, then remove comments or notes not wanted on the final form.
Save the form.
Use another application to link its fields to a database if desired.
Post the form to a web site or distribute it by e-mail.