I save pretty much every time I do something big in a game. I do keep autosave on most of the time but in Minecraft I turn it off. I like to make builds in the game but if I make something I don't like I would have to tear it down and that takes forever, so I turn off the autosave and make the build. If I like it then I save the game so I can keep it, if I dislike it no big deal, just close the game and reload the world and it's like I never make the build at all! (I play the Wii U version of Minecraft btw and that one has the autosave feature)