I have sp some times when i sleep but i am to scared to continue. every time it happens i think if i stay in it to long i will die. So i have to move my arm until i am out of it. Now i am interested about learning about it and i want to have a nother one. How can i. 
Well, what I know about SP is that it occurs in both pre-sleep and post-sleep, getting SP in pre-sleep is probably you’re intention and also the easier one to achieve…
Too get this you would need to have some knowledge about WILD and WBTB; (See topics in the Quest for Lucidity subforum and the LD4all main page under ‘How’)
So basically you perform a WBTB, and then WILD, preferably on your back, since that gives the most likely chance of SP, then just start the WILD and wait for you’re body to get into SP.
post-sleep SP occurs when you wake up during REM sleep, this is more likely to happen when you sleep on you’re back…
When you wake up in this state it is said to be relatively easy to go into an LD by just falling asleep conciously (like WILD).