I just remember to do them about every half hour. If I had dream signs that happened often in real life too, I'd try to use them, but I don't have any that I've noticed. When I'm intent on doing it, and excited about having a lucid dream, it's easy to remember to do RCs.

My reality checks consist of becoming aware of my surroundings, looking at objects around me and realizing that they're real, that this is my everyday life. This works for me, because in my dreams, I'm almost never in my house. I don't have to look at my hands, or look at a watch, or anything like that. As soon as I question whether I'm dreaming, if I'm in a dream, I realize it right away.

I also make a special effort to do RCs when something strange is happening.