Disable Auto-Save
Here’s another tip and another powerful feature that the writers of WordPress forget to let you switch off!
Auto-saving can be a lifesaver when you’ve spent half an hour writing a post when the PC crashes but it can also be a nuisance. Personally I have it set to ten minutes (600).
Open your WordPress Config File:
wp-config.php
And after the first set of functions I added this line:
define( ‘AUTOSAVE_INTERVAL’, 900 );
By Default this value is set to 60 (seconds), 600 equals 1 Hour, 900 equals 1 1/2 hours, you can go higher, but i figure 1 1/2 hours in my case is good.
Via Disabling WordPress Auto-Save and Revision Saving