Yep, Larry is one of the good guys! The best way I've found to avoid any sort of tracking error regret is to simply not track anything but my portfolio and to not compare it against any benchmark. The only thing that matters is whether my long term goals are being met by what I'm doing. Might there be another portfolio that would get me there faster or result in a larger dollar amount? Sure, there's always another portfolio better than the one you have, but you have no way of knowing that in advance. Conversely, there's always another portfolio that is worse than what you have.
Figure how how you want to diversify, put together your plan, stick to it and ignore everything else. If, occasionally, you must peek at what sort of short term performance others might be experiencing, remind yourself the reasons you put together the portfolio you have in the first place. Helps some people to put together an Investment Policy Statement as sort of a contract to yourself.
There are many roads to Dublin.
Cheers