I've done the star ground, back of pots, stuff like that. What I've been doing lately is soldering the trem ground straight to the output jack ground lug. That's one less wire in the cavity. Then the pickup ground and volume pot ground wires get hooked up to the same lug on the volume pot. If a tone pot (or 2) is used, it's grounded there as well.
When wiring Strats with SSS, 1V, 2T, 5-way, then I'll run a ground across all 3 pots and ground the pickups to the back of the volume. It's just easier in that situation.
When soldering the wires to the back of a pot, I'll hold the end down (pre-tinned) with the soldering iron tip and get some solder flowing (not gobbing). If it's gobbing up, it's not hot enough. Once the solder flows, I hold the wire with my finger and remove the iron or I'll use the tip of a flathead screwdriver and use that to hold them down while I remove the iron.