Andrew Cunningham:
Is OS X Server for you? If your household or small business uses mostly Macs, iPhones, and iPads and even one of the services here piqued your interest, then yes. The barriers to entry (both financial and technical) are lower than they’ve ever been, and you didn’t have to pay for Mavericks anyway. If you have a lot of Windows and Linux systems in the mix, OS X Server is not without its uses, but you should probably start your search elsewhere.
If you’d like to manage a few Macs or iPads, set up a basic small business server, or even just use a spare Mac as an OS X Caching Server, start with this excellent guide.