I just came up with a new method. I comment on YouTube videos all the time, and when I check for responses to my comments, I have to first go to the page that lists my private messages. The only private message I keep is one that I sent to myself. The subject is a question: Are you dreaming? Every time I see that, I think about it and try to float. Floating is my #1 dream sign. Sooner or later, I try it in my sleep. If I can float, I KNOW I am dreaming. Even if you don't check YouTube much, you can leave signs around your home and stuff, maybe make a painting with the question and put it on your wall. You can also make your watch a dream sign and a cue to do a reality check.