保存输掉的彩票。 上交所有输掉的彩票。 避免“神秘包裹”或者其他一揽子促销。 投注之前检查彩票。

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Many places will run second-chance lottos, in which you can send in the old tickets from particular games for a drawing. Keep old tickets organized by game in an envelope, and go through it for second-chance opportunities when they're announced. Send them in and hope for the best. That losing ticket might still win you money. Sometimes, the lottery commission will advertise these second-chance drawings when the top prizes have already been paid out, to try to drive the sales of essentially usele