Advice to Video Game developers in regards to saving.
Rule 0: If your game doesn't allow saving or intentionally limits saving in some way for some kind of challenge or hard core mode: make sure this is made clear up front... like, before I download or purchase the game.
Rule 1: Always let the player save. I don't care if it's mid-cut-scene or on a menu six levels deep... let the player save. As a parent I want to be able to wrest the controller from my child's hand at a moments notice (or drop the controller to deal with an emergency) without having to take more than a moment to save.
Rule 2a: If your game only has only one save slot: Don't make "New Game" an option... Just have "Start" or "Continue". Make "delete existing save game" an option in some settings menu.
Rule 2b: If your game has multiple save slots make it possible for players to easily differentiate between them. Give them a screenshot, a "date/time started", "total play time", "date/time last played", a brief indication of progress made, and the ability to name the save itself.
Rule 2c: If your game auto-saves make sure it keeps the last couple of states... not just the most recent "let's save the game right before you die" and let people manually save if they want to.
Rule 3: Come up with a way for saving not to seem scary... "Are you sure you want to overwrite the existing save file?" is scary... if you did Rule 2a properly the only time save related actions should be scary is if you are deleting a save file.