There are several major search engines that you should know something about to optimize your submission. Submission schedules are maximum frequency. This is reputed to be the largest search engine. This is another very large search engine. Yahoo is the most popular search engine on the net but getting listed can be difficult.
Estimates are that only a few submissions get listed and even then it can take a while.
More info There are hundreds of search engines on the Web. Web directories Look for special directories that fit your site's subject matter. There are specialised travel directories, directories of online shopping sites, local area directories etc. Keep a record Most search engines send out an email confirmation. Keep them, as some contain passwords that you may need to modify your data later.