More tips.

Use compression to provide pumping volume FX.
Use a decent reverb to give you space in the mix
Chorusing and flanging applied mildly can give a static loop movement
Use the BEST quality sample CD you can find (Vengeance Club Sounds Vol1 would float your boat ireckon)

Get your ears listening for quality... dont accept something because it excites you, accept it because its of great quality. Dont drink while mixing down, dont smoke weed whilst creating.