wow, how vague can you go with description. http://wordpress.org/extend/plugins/
1st – Install the plugin called “Plugin Installer”. I swear by it. It makes uploading and installing plugins even easier than it was without it.
2nd – Install every plugin that catches your eye. I have probably installed 60 plugins. Then disable them all. One by one enable them and configure them to see if they do you any good. Also, by doing it this if something goes wrong, you will know which plugin caused “bad stuff” to happen and can just deactivate it.
Or, what do you mean by “good”?
