I'm nervous - First time optimizing my site

Can someone please take a look at my backend programming, and tell me
if I did a good job?  And if I didn't, please don't hesitate to be
ruthless - I need to know if what I've done for my site works.

The site didn't used to have page titles, descriptions or keywords at
all.  It was a mess.   I tried my best to clean it up...How'd I do?