Let’s start off fairly easy. Most people that will ever attempt to hop onto a rail 50 50 or tailpress will do it frontside. You’re facing the rail, you’re kind of jumping forward and you can see exactly how much pop you need to get over the rail.
Backside 50 50s and tailpresses are definitely a little more challenging as you have the definite possibility of catching your heel edge on the rail. The trick is to take a little more speed and snap a nice clean ollie to take you above the rail, rather than thinking about jumping backwards per se.
Still, although this is pretty basic (let’s ignore the casual frontside 360 out that Halldor adds to the end of it eh?), we’d recommend you give it a go while you’re still young and less prone to getting banged up by cold hard steel.