How to keep things in perspective?

Often times something will happen to me and I overreact. Luckily I’m a thinker so when I’m mad or sad or whatever I say nothing that reflects how I’m feeling. But I’ll get super mad whether at work or home or whatever and want to quit on the spot but then I come back because i need money. In hard times I think of a difficult time and say “I made it through that so I can easily do this” and i go in more confidently. But how do you keep moments in perspective?
How to keep things in perspective?
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