I set intention by visualization too and it really helps if you make the visualization as enjoyable as possible . it shouldn't seem like a chore but something which is a fun little exercise . You don't have visualize getting Lucid repeatedly , you can just imagine what you will do after you get lucid , what stabilization methods you will use , What is your dream goal and how will you go about doing it .

You can also do a short mediation right before performing the visualization to clear the mid