It's one of those things that is so much easier to have a go at than have explained to you because it's mostly about feel. I've driven a lot of RWD cars, many of them underpowered, and the only one I found difficult to slide was Kaiowas' MR2 Sprint car and that's because it wasn't mine and I didn't want to take the mick with the clutch brutality and so on.
One of the nicest cars to slide was Freefaller's MX-5, very very controllable. Kate's 200SX was also ridiculously simple to get dancing in the wet (it's much harder in the dry in any car to be honest) - lots of power and a turbocharger are ideal for breaking initial traction.
The Manta is easy to get sliding, harder to hold a slide out as it lacks an LSD and about 80bhp.....even my 1.8 Sierra running on 3 cylinders was easy to get sliding, never had an issue with my Volvo 940 either.
Doing it from a standstill is the safest way of getting started I think, although it can be quite un-dramatic (lots of wheelspin and not much drifting) if the road, er track, doesn't have any sort of camber as a lack of LSD means you are more reliant on weight transfer which you can't use much of from a standing start.
My personal favourite is a nice wide stretch of track, drive down it at about 40, handbrake turn and get straight on the gas when you are at about 180 degrees, then keep the power on and fishtail out facing the other way. Don't do this on the road though. Ever
