This is great! As it happens, I don't get them wrong, but almost everyone else does. I do disagree with one of them: I don't have any objection to the usage of "since" as synonymous with "because", since I think this is now accepted (and used!) even by people who are otherwise very pedantic about such things. ;)
The explanations are very good. I especially like the explanation of the "which"/"that" distinction, which I actually do understand but always find very difficult to explain to others.
Finally, of course, euphony and simplicity trump pedantry. None of the rules set out should be followed when doing so forces clumsy, ugly-sounding, or unclear prose. Then again, they are often violated for no good reason that I can see. I hope all potential writers for the Journal of Evolution and Technology click on the link.
H/T Kenan Malik.