1 - It's best to use the pencils dry first, then brush on water near the end (you'll find the pencil marks are very different when used on damp paper).
3 - Experiment with different kinds of line work, like 'hatching' or 'scribbling': shading doesn't always have to be invisibly blended and linear marks can be exciting.
5 - Experiment with a limited palette (I often use only 3 or 4 colours in one sketch). It's usually more important to describe areas of shade and highlight, rather than worry about faithful colour.
7 - Put water on in simple strokes with a brush that's not too fine. Don't scrub or keep going back over the same place, or your colours will get muddy and your 'paint' marks fussy.
9 - Try keeping your brush marks visible, so they are not always blended away to nothing: they too can be visually interesting.
Hopes that helps. I've found my Inktense watercolour pencils a really fun medium and perfect for drawing out and about, when I want bold colour but don't want to carry lots of painting gear. By the way, a waterbrush is another very handy piece of kit, as you really can paint anywhere with no water to carry (about £5):
You can see more examples of my Inktense sketches here (scroll down).