All good advice. I would only add:
Whenever using non photographic bottles to store chemicals, I always label them w/ large red letters that say POISON, draw skulls w/ Xs on them, etc. You never know who might use them, or when your own brain might take a vacation.
It's fine to reuse the fixer too (at least I always did w/ my Kodak stuff). Simply pour it back into your big stock bottle, and every now and then do a clip test to see if it's still good. My gallon of Kodak rapid fixer has made it nearly two years so far, even w/ pouring the old stuff back in. Obviously, the bigger your stock solution bottle the more mileage you can get out of the fixer if you do this. You can see how inexpensive it is to do your own printing and developing. The only chemicals you'll have to buy for quite a while is some developer. When printing, it might be a good idea not to reuse the fixer if you're in there for hours and hours like some of us.
I always pour all of my chemicals through a coffee filter before using them, and use distilled water in everything (both things really help cut down on crap on your negs). At some point I stopped using stop bath and went to a plain cold water rinse from the faucet. Worked just as good, and got rid of that awful smell. For fiber prints you should use a stop bath.
