AutoCAD offers eTransmit (File-->Transmit) as a way to quickly prepare drawings to be sent to someone else. When you start the command, it locates all the supplementary files associated with the main drawing (xrefs, text files, images, etc.) and brings them together in a ZIP or EXE file. You can select the format the drawings should be saved in, whether to remove the paths from xrefs and images (this is usually a good thing to do!), and several other options. In the more recent versions, you can also choose to bind xrefs, add drawings and their associated files, and save your eTransmit options as a Transmittal Setup for easy reuse.