Fortunately, we (as a community) are getting better about supporting specific constantly-up-to-date packages on $STABLE_DISTRO. One of my workstations is Ubuntu 12.04 LTS (eventually I'll upgrade it to 14.04); I use the official Mercurial & Git PPAs to stay up-to-date; Google Chrome ships its own update repository. In this fashion, most apps that I care about are just as up-to-date as a bleeding edge distro, but with none of the constant churn.
With COPRs and PPAs, you have to be selective about which ones you use. I try to only use official ones owned/managed by the upstream projects.
You may also be interested in Parsix. I haven't tried it yet, but basically it's Debian Stable + selective updates... although I think it only goes up to what Debian Testing has, so no GNOME 3.12 for you (yet).