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If you download an app you don’t like, you can go to the application manager in settings and uninstall it. It’s a little harder to delete the ones that come with the phone, but you can disable some of them. I recommend this so they are not eating up your battery. You can also turn off notifications in most apps, so it doesn’t beep every time you get an email or someone likes something you say on Facebook.
Here is a site that recommends apps and explains them. http://lifehacker.com/5825401/the-lifehacker-app-directory-android