I'd agree with everyone saying WILD; I only had one, but it was very realistic, though only like 2 minutes long...

Another method is to enter directly after a dream...when you wake up from a dream, think about entering it again, it works extremely well if you can remember to do it. It's also really far out being "pulled" into a dream

And this past week, I've kind of got my own crazy method where I catch myself right before falling asleep and manage to enter a dream, no clue how it works, but it does...