Re: Shoddy footwork
Take entire rounds of shadowboxing just moving, feinting, moving your head. Throw in the jab once that doesn't feel weird. Then move on to throwing other punches, but only after you take an angle. You're moving, feinting, couple jabs, then BAM pivot to an angle and dig in something good....then get out and do it again.
I like to just shadowbox in my house, and since I never clean I have things all over the floor to practice footwork by moving around.