Hey Celtrum, welcome to Dreamviews!

You're referring to a techinque known as WILD. If you keep breathing, you should end up having sleep paralysis. After this, you end up in a lucid dream. You've already found a tutorial, but there are a lot of them. Here's a few others:

http://www.dreamviews.com/community/...ad.php?t=40684
http://www.dreamviews.com/community/...ead.php?t=9806
http://www.dreamviews.com/community/...ead.php?t=1886

You can find the other techniques in the tutorials forum: http://www.dreamviews.com/community/...splay.php?f=25

No matter which technique you choose, you should always be keeping a dream journal. This just means writing down your dreams when you wake up. You should also be reality checking often.

Should you have any other questions, feel free to ask me or any of the other dream guides for assistance.