Tough to listen to  

Somehow we have to convince pilots, even those flying vfr aircraft, that if there is nothing to look at outside, don't look outside. I feel positive this pilot had plenty of instruments to maintain control looking inside. Trying to combine looking inside and outside , when there is nothing to look at outside is a loser.

I have been IIMC in vfr aircraft. I am an IFR Captain but I still found IIMC a scary deal. Once I excepted the fact that I needed to operate the aircraft on instruments things settled down pretty quick. I have always told my fellow pilots that the aircraft doesn't know it's in the clouds so it's on the pilot to perform. 

One piece of advice is to work your instrument scan into every day flying. Pick an altitude and maintain the altitude with instruments. Same way, pick airspeeds and headings and maintain. A second piece of advice is, when operating in low visibility, start really considering what you will do in the case of IIMC. Have a plan and when the worst happens commit to the plan like your life depends on it.