Here's an idea for the advanced lucid dreamer. It has not been tested by me yet (and I'm not sure, that I'm adequately advanced yet either).

Premise: you wish to change something about yourself

Idea: the change should be brought about through hypnosis

Twist: use a DC hypnotherapist to hypnotise you during a lucid dream

Who knows, maybe it works really well compared to ordinary hypnosis.

Incidentally ... try to avoid using a megalomaniac DC, bent on world domination, and disguised as a hypnotherapist.