If the app
causing wakelocks has a sync feature, set it to sync less often, sync manually, or disable sync entirely (if you never use it).
Youwill see a list of actions that
caused wakelocks.
And you were really in trouble if an app encountered an error and
caused a wakelock — your phone could be nearly dead (and warm to the touch) in the morning.
Not exact matches
For example, in the screenshot below, we can see several
causes of
wakelocks: Google Maps automatically updating our location (presumably so Google Now will know where we are), Pocket syncing our unread articles, Twitter syncing new tweets, and the Google + app syncing new content.