Yea, you need to try to keep your emotional state more stable too, sometimes when you feel too strongly upon discovering you're lucid (like the joy of being lucid) you can lose your dream.

Personally, I discourage the spinning technique, I tried it before and instead lost the dream and lucidity for the rest of that night. Touching, staring, just strongly focusing on anything within your dream scene can help stablize your dream, a lot of people stare at their hands because I mean... they're kind of always going to be there.