Please make sure you are close to the printer you are printing to so you are able to pick up your material in a timely manner.
For best results, convert your file to PDF prior to printing.
Printing from Google Docs
Since Web Print requires you upload a file to print, you will have to download your Google Doc document to your PC so that you can print it. To download from Google Docs, navigate to the File tab and select Download As. Here you will see a list of options to download as. Select PDF as it is Google Doc's only available choice that is compatible. It will proceed to download the Google Doc as a PDF. From there you can upload that file to Web Print.
For more details please review:
Using Web Print for Wireless Printing on Campus
Locations of Printers for Web Print