drop D/C/Cb/B = gay and nub and does nothing for progressing your skill or knowledge as a guitarist.
-EDIT- oh,something i failed to mention because it was second nature to me, but not necessarily all, is your major scale pattern. lemme see if i can tab it right in this window...
-----M--P---I--M--P---I--R---P---------R--I-----P--M--I---P-M
E----------------------------------------------------------------
B----------------------------------------------------------------
G----------------------2--4--5-//7\\-5--4--2-----------------
D-----------2--3--5-----------------------------5--3--2------
A----3--5--------------------------------------------------5--3
E----------------------------------------------------------------
I = index finger
P = pinky
M = middle finger
R = Ring finger
// = slide up
\\= slide down
great excersise to build both picking stability, speed, accuracy, and form, but also great for building your left hand and the often ignored pinky. Also note, that that is the major scale patter, and as such can be moved anywhere and will be the major scale for the root (starting note). Try picking straight in downstrokes, getting progressively faster each time you go up the scale, and once you start to notice that it's too hard then slow back down again. Then try alternating your picking between up strokes and downstrokes.