If someone says, "The best advice is found on the pillow," he/she means that it might not be good to worry about your problem now. You may be able to solve the problem after a good night's sleep. People often say "I'll sleep on it" to express the same idea.
eg: I don't think we can come up with any more answers tonight because we're all tired. Let's sleep on it. The best advice is found on the pillow.
Note:
The best advice is found on the pillow的意思是你先別擔(dān)心，睡一覺也許明天一切就會好了。
例：我們都太累了，今晚也無法思考更多了。先睡一覺，明天再說。
eg: I don't think we can come up with any more answers tonight because we're all tired. Let's sleep on it. The best advice is found on the pillow.
Note:
The best advice is found on the pillow的意思是你先別擔(dān)心，睡一覺也許明天一切就會好了。
例：我們都太累了，今晚也無法思考更多了。先睡一覺，明天再說。