You should take a leaf out of his book and save more money.
take a leaf out of someone's book
idiomTo adopt an idea or practice of another person.
If you want to improve your fitness, you could take a leaf out of her book and start walking every morning.
The young entrepreneur decided to take a leaf out of his mentor's book, adopting the same disciplined approach to management that had brought the older man such immense success.
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another nail in someone's coffin
An event that increases the likelihood of or causes further failure.
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answer someone's prayers
To be or do exactly what someone has been wishing or asking for.
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answer to someone's prayers
Exactly what someone has been wishing or asking for.
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apple of someone's eye
The object of somebody's affections; a person (or sometimes a thing) that someone strongly prefers; a favorite, a loved one.
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bane of someone's existence
Someone or something that poses a significant problem to someone.
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bash someone's face in
To beat someone violently.
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bash someone's head
To beat up someone violently.
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be someone's to lose
To be anticipated to be won by someone.