Relying on sheer repetition rarely works when typing at speed. You need an intuitive conscious spelling mnemonic that breaks the word into manageable phonetic blocks.
The cleanest approach splits the word into three distinct chunks: CON + SCI + OUS.
Look directly at the middle segment: SCI. That sequence mirrors the first three letters of science. When writing, tell yourself: "Science requires a conscious mind." Because science investigates empirical reality, linking the discipline of science to the state of being conscious guarantees you will never drop the "c" again.
For the trailing letters, focus on the ending: -OUS. In English morphology, "-ous" serves as a dependable marker for adjectives (such as dangerous, nervous, and precious). Since "conscious" describes a state of being, it demands the adjective ending. Meanwhile, the noun "conscience" contains the word science in its entirety: CON + SCIENCE. If your moral compass has a solid foundation, you are simply adding "con-" to "science."