To start, you'll need a few additional packages that you probably didn't install from the beginning, so lets grab them now.
[root@fedora17 ~]# yum install gnome-tweak-tool gnome-shell-extension-alternative-status-menu gnome-shell-extension-pidgin gnome-shell-extension-user-theme gnome-shell-extension-alternate-tab gnome-shell-extension-common gnome-shell-extension-remove-accessibility-icon gnome-shell-extension-theme-selector gnome-shell-extension-remove-bluetooth-iconThat gets us part of the packages we need, but there's still a few more things we have to get. For that stuff, we can turn to http://extensions.gnome.org.
Fedora17 ships with a nifty little firefox module for gnome3 that will allow you to add/remove/control gnome3 extensions directly via firefox on a per-user basis. We're about to use this functionality to get a few extensions. These put the menu back, add your favorite apps to the top bar, move the clock to the right beside the user's name, and reduce the pretty animation time so you can do your work faster.
Now hit alt+F2 again, and type in gnome-tweak-tool. On the desktop tab, flip the switch to allow the file manager to handle the desktop. Next hit up the shell tab. Set the button alignment to ALL if you haven't already. Finally, proceed to the Extensions tab and enable everything we've discussed here so far if it's not already enabled.
Close the app, log out, and log back in again. Your screen won't be exactly like gnome2 was, but it's LOADS more useful than a default gnome3 setup.