Upload it to a site like File Savr, SendSpace, Bandango or Rapid Share.
Can also use one of those Email sites like YouSendIt or many others.
Can also use something like WinRar to make multiple archives and send it one by one.
Depending on the size you might not even be able to use these methods as they have a file size limit of anywhere from 1GB to 3GB. If it is any larger than that you will have to get some space on a server to upload it to and send a download link or just send it via snail mail.