The tricks so mellow you shouldn't need to "toss" This trick is all in your head and approach. Come into the jump almost like going straight off.
Drop in, go straight into it, as you reach the bottom of it, roll onto your heel edge and then as you go up the jump roll onto your toe edge so you go off the jump straight, dont have to carve on the lip for this trick.
Your approach should be pretty straight.
once you get your approach done, you go off the lip. pop off of your toes slightly, "look with your head" over your back shoulder and spot the landing. Turning your shoulders smoothly and not jerking your upper body. you'll spin the 180 and land it.
You look like you got it. Just try to do it smooth. Its one of the easiest tricks, learn it, love it, and keep it steezy, it'll probably become your favourite trick once you start hitting bigger jumps, feels sooo good doing a slow rotating bs180 with a tweaked out grab off a nice jump.
Check out snowboard addiction, I've watched all their free videos and they are really helpful, explains things well and has some key information in them! They got stuff on vimeo and youtube so check both!
This video from them has some great information about approach, even if you aren't out there chuckin 540's and 720's How to 360, 540 and 720 Frontside or Backside (regular riders) from Snowboard Addiction. - YouTube