For me whenever I go lucid, I have a huge amount of control over the dream, and the things I see in it are just crystal clear. I posted a topic long ago about the fact that when I go lucid I make special note of the detail in the dream, and it looks like it's real life in my dreams. I always make note to remember it when I wake up. (If you find yourself lucid in a dream, telling yourself something works REALLY well.) But my dreams mostly start off like that, so I don't have to worry about increasing control or clarity.

The only tips I could give is to spin if you can or focus on your hands. I find that if I can see clearly in a dream, my level of control will be much higher. If a dream is blurry or fuzzy then my level of control will be very little, if any and I tend to lose it very fast.