Hi there — I've been frustrated with selling on Zazzle because
their bulk uploader seems to only place art on about 100 of their products, when they sell many more than that.
Hootsuite allows you to schedule your messages and updates in advance - you can even use
their bulk uploader to schedule your posts from a CSV file.
Power Editor is a free tool that replaces and enhances the capabilities of
the Bulk Uploader.