You shouldn't doubt yourself so much. Take any advice into consideration and do what you will. I agree with the idea of doing reality checks while you're playing games for two reasons. First, this gets your mind used to associating video games and their scenarios with RCs. Secondly, many times you are focused on the video game, almost mindlessly so in a sense, and if you are able to constantly remember to RC during this time then you will most certainly increase your chances to become Lucid.