Saving out a file in Illustrator
Make sure all of your fonts are outlined and all of your images are embedded.
Go to file -> save as -> choose Adobe PDF (PDF) then hit SAVE
Click the "Adobe PDF Preset" dropdown and choose "High Quality Print"
Uncheck the "Preserve Illustrator Editing Capabilities"
Click Save PDF
Saving out a file in Photoshop
Go to file -> save as -> choose Photoshop PDF (PDF) then hit SAVE
Click the "Adobe PDF Preset" dropdown and choose "High Quality Print"
Uncheck the "Preserve Photoshop Editing Capabilities"
Click Save PDF