After playing through DMC 1 earlier this year, I wanted to compile all of the useful advanced techniques in one, easy to find place.

Table of Contents:
0:38 Slash Cancelling
3:15 Grenade Rolling
5:00 Shotgun Twitching
6:04 Jump Cancelling

Contributors:
Voice over   / euchre_afgc  
Thumbnail Creator   / tsuntenshi  
Video Editor (me)   / rensoshi  

Songs Used (in order):
From Midst of Town (Ali Project)
Combat (Crisis Core OST)
Devils Never Cry (DMC HR/HM Arrange OST)

(Small note about Shotgun Twitching's application against Mundus: I didn't mean to make it sound like it should be used as a strategy to defeat Mundus with, but it's great at recovering Devil Trigger so you can use DT in the fight more often)