When creating a PDF with Adobe Acrobat Pro, use Lulu's Adobe Job Options (Available at the bottom of this page). After downloading to your computer, double click the icon to install the Job Options into your Adobe Acrobat Pro products.
If using Apache OpenOffice, follow the instructions here: How to make a PDF using Apache OpenOffice
If you are uploading your own PDF, follow these guidelines:
For more information, see Recommended PDF Creation Programs.
There is also a community generated list of PDF Converters and Readers available in the Lulu forums.