The user may thank you for selling them something better. Test your keywords. Search for each one on any search engine and then examine the top few Web sites to see if there are any other keywords you might like to add to your list. A user will search for 'pet' or 'pets'. Your keyword 'pets' will match in both cases.
Users often search for well-known phrases like 'web site promotion'.
The first, and most powerful aspect. Do the same for your subpages. Don't put too much effort into trying to have a title which is low alphabetically. If it's naturally low, then good, but it's becoming of less and less importance. Not as powerful as most people seem to think.