I know this is an open ended topic with many many varied posibilities depending on the type and amount of equipment one uses. However, I see some value in discussing it. For my part, I'm never quite satisfied with my setup. It always ends up being larger, and more complicated to hook up than I had planned. I've tried X stands with and without 2nd tiers, expandable tables, headworn mics, mics on stands, A-frames, one of which is extensively modified to accommodate a sequencer arm, two keyboards, a sound module support, a music stand and a mic boom. WHEW! Add to that, where to set the PA speakers (and head if speakers are not self powered). If one uses a laptop for lyrics/fakebook and/or sequencing where do we set that thing. This is just for starters I'm sure there are a lot of other things to consider. Personally, I ascribe to the "Uncle Dave Approach" and am actively working toward minimalizing my whole rig.
DVJ