It used to be that the people who worked together on a project were located under the same roof. Today, they might not be on the same continent. The Internet has enabled workers to scatter like dandelion seeds in a gale, and it isn't unusual to find yourself working closely with someone you've never met in person.
Telecommuting is wonderful, but it does introduce complications.
Several software tools can help you address these issues. Here's a guide to stocking a remote-collaboration toolbox, and some tips for my favorite tools. Look over the latest brochure layout and get back to me. Approve the new logo design. Proof the annual report before tomorrow.