I'm probably not what you'd think of as a concert stage manager - as I work full time for an opera company - but that's primarily what I do. We have about 5 standard school shows we perform, many of which are a series of scenes, but otherwise, we do a lot of community concerts in one-off formats.
I am a fairly one-man band. On smaller shows, I just leave run orders backstage for the singers while I'm out front running lights. For bigger shows, a co-worker or boss's husband follows those sheets. On the rare occasion of a weeklong or more tour, I can hire (or co-erce) a friend to assist. And I'm incredibly lucky to have someone (hi Greg!) who loans me a wireless headset system quite a bit.
I have been able to up our production aspects quite a bit over the last several years. You'd be amazed how helpful a handful of tri-fold wicker screens, a donated Oriental rug (the Guild lady LOVED giving it to us) and our "U.B. - the Ubiquitous Bench" (plastic, looks like marble) can be. And you know those cheesy tables that three spindly legs screw into? They actually look darned good with a nice round tablecloth over them. We've got three of them now (easy to carry as an extra prop table, too, when you're transporting by minivan most of the time). And that colored rope light you can find even easier this time of year? Fantastic for quickly setting up runlight (not only one man band, but limited time).
Erin