Moving too quickly and expecting to LD before I was ready to. For me LD'ing is a slow and ongoing progress where each step needs to be identified and understood fully before progressing on to the next step. From my experiences first you must get used to vivid dreams, see them with your eyes, think about them, understand them for what they are, what makes each vivid dream different to the next, what your mind set was at the time, etc. Were you following a narrative? Were you consciously aware of things at any point? What did you question? Did some events make logical sense or was it mostly nonsense? Every dream state is different; to me it is not a hobby but it is a science to be experimented with and understood, and the more understanding you have of the different dream states you encounter the more strength and tolerance you build each time you enter a dream. The mistake I made was thinking that writing a dream journal and practicing RC's was going to make me lucid and I was going to become a master over night, that isn't the reality of the situation for me. There is far more to be experienced, explored and understood before being ready to attain and control states of true lucidity.