This is one of those things that tends to get under my skin. Web sites with long pages showing far too much information on the front page. Realistically I think the best approach is to give users access to plenty of information, but not necessarily having them bombarded with it. For the WordPress Default theme (the one based on Kubrick) this is done by showing only post excerpts as opposed to the entire thing.. You can follow the steps below to this affect:
That’s it. One note though, I would always comment out any changes I have made so that should something go wrong I can always switch back. If you want to comment it out instead of replacing it then you would use < ?php //the_content(‘Read the rest of this entry »’); ?>