Usually you can go into Settings- Apps - And uninstall from there or long press on the app and choose uninstall. Others that are baked in i.e. on the phone out of the box sometimes cannot be simply uninstalled. Some can be removed by a package disabler from the Play store but be careful and what your doing with it. Other than that.... Delete old emails and attachments. Delete old texts and Mms messages. Delete unused downloaded ringtones. Delete pictures and or use Dropbox or Google Drive or Sd card to store them. Move or delete videos and any unused downloaded tones. Delete old notes. Delete old calendar entries. Shut the phone down and then from a set series of button pressess that takes you into the phones file system and clear the system cache.
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