One thing I found I really liked was using my tree lanyard on a structure. Had to do some work on stripped abutments, and my boss was using my old harness and fall lanyard. That left me with my new fall/climb harness, but no lanyard to get up there with him to mark stuff. I used my arborplex lanyard attached to the lower climbing D. Not "legal" I'm sure, but it was for compliance purposes, so everybody could see everyone had their harnesses on. I'd have been fine without one.
Anyway, I could keep myself on a short leash with that setup. Let a bit out with the prusik, or haul myself in with the pulley. Nothing yanking on me, or some heavy autofeed box hanging off my back. very compact, without extra stuff hanging all over. Speaking of which, one of my "favorite" lanyard tricks is crouching down to mark something, your lanyard gets under your heels, and you almost pull yourself over when you go to stand. LOVE that :^S