The best way is always to stop when you are going good and when you know what will happen next. If you do that every day ... you will never be stuck. Always stop while you are going good and don't think about it or worry about it until you start to write the next day. That way your subconscious will work on it all the time. But if you think about it consciously or worry about it you will kill it and your brain will be tired before you start.
Ernest HemingwayAnd we could have all this,' she said. 'And we could have everything and every day we make it more impossible.' 'What did you say?' 'I said we could have everything.' 'We can have everything.' 'No, we can't.' 'We can have the whole world.' 'No, we can't.' 'We can go everywhere.' 'No, we can't. It isn't ours anymore.' 'It's ours.' 'No, it isn't. And once they take it away, you never get it back.
Ernest Hemingway