Using Adobe Acrobat Pro to Reduce PDF File Size
Using Preview (on a Mac) to Reduce PDF File Size
Click "File" in the top-left corner of your screen
Click “Export…”
Make sure “Format” is set to PDF
If it is not, you can change this by clicking on the drop-down menu to the right of “Format:” and then clicking on “PDF”
Click on the drop-down menu to the right of “Quartz Filter:”
Select “Reduce File Size”
If you want to change the location in which to save the PDF, click on the drop-menu to the right of “Where:” and select a new location
If you want to rename the new file, do so in the text box to the right of “Export As:”
Click “Save”
Using Smallpdf.com to Reduce PDF File Size
Note: Smallpdf only allows for two free "jobs" per hour.