Printable, blank petition forms are available at AtYourBusiness.com, SampleTemplates.com and TidyForms.com. AtYourBusiness.com allows users to download the forms in Word or PDF format. Tidy Forms has forms available in PDF or DOT format, and Sample Templates has templates in PDF format.
When starting a petition for some type of change, briefly summarize the topic of the petition. There are two audiences to a petition: the prospective signer and the decision maker. Keep the arguments rational and reasonable. Avoid making threats, but emphasize the solidarity of the organization or community making the petition. It's best that signers both print and sign their names.