The number of ways is growing. There’s Apple’s own AirDrop technology (available only on more recent Macs, and recent versions of OS X; limited to a local network). There’s apps like Dropbox and DropCopy. And, there’s the geekiest solution of them all.
Personal, Secure, File Sharing
Just between you and me, probably the easiest way to share files with someone else is with Dropbox and the Dragshare for Dropbox add-on utility.
Just drag and drop a file onto Dragshare’s icon in the Mac’s Menubar, and it zips up the file, uploads it to your Dropbox account, and creates a link you can share with anyone.
Or, if you want something that’s both more secure and complicated, there’s Dropshare, which has nothing to do with Dropbox or Dragshare but works in a similar manner.
All you need is a remote server with a working SSH user account. Dropshare uses the Secure Copy (SCP over SSH) to upload and share files but it does more than that.
Dropshare will create a shortened URL using Google to provide a link to the file. It can also upload screenshots from your Mac, give you a history of uploaded files, and creates an attractive landing page for each upload.
Considering the price tag, Dropshare is a good value with a modest price tag that adds a layer of security to go with the obscurity through obscurity shared-link method.