Use search-engine-friendly paths
A search-engine-friendly path is a directory path on your server that search-engines, with their crawlers, can easily traverse (read here for a more detailed explanation).
By using them, you are sure that Google, Yahoo and others will index all of your site, thus giving more possibilities that your posts can be found by generic queries.
A search-engine-friendly path looks like this:
http://www.moneyblogger.net/2005/08/04/use-search-engine-friendly-paths/
while a non-search-engine-friendly path look like this:
http://www.moneyblogger.net/?m=200508
This is a very important step you should consider in order to increment the possibilities of being found when people is searching for a topic you have dealt with. Another important thing to remember is not to change the URL format once the blog/site has been made public: in fact, people may have bookmarked, or linked from other blogs/sites and changing URLs could result in dead links.
