Most tips I've read about how to trigger LD involve conscious effort throughout the day to check that you are not dreaming. It's weird, but I used to ask myself everytime I flipped a light switch "is this a dream?". It gets your brain in the habit of questioning when you're in a dream state and that can carry over to actual dreams.

I'm not aware of any foolproof method to experience LD, but it was definetly something that I worked hard at and didn't come naturally.