After a while, you will have more lucid dreams. A dream journal serves a few purposes. The most important is that it helps recall. A few other things is it can help locate a dream sign. When you do Reality Checks around dream signs, that can transfer to dreams. You can do a reality check, and become lucid any time you are dreaming. Not only naps.

Keep a dream journal, locate a dreamsign, and do reality checks. You'll be lucid dreaming in no time.