趁早 chènzǎo as soon as possible

as soon as possible; at the first opportunity; the sooner the better; before it's too late

How to remember 趁早: 趁 to take advantage of + 早 early = as soon as possible.

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Adverb urging you to act now while conditions are still good - 趁早走吧,天快黑了 (chènzǎo zǒu ba, tiān kuài hēi le) leave now while you still can, it's getting dark.
The 趁 carries "take advantage of the window": you do it early precisely to avoid trouble later, often with a warning or advice tone (趁早放弃 give it up now, before you waste more time).
Blunter and more urgent than 尽早 (jǐnzǎo, as early as possible), which is neutral and polite; 趁早 often implies "or you'll regret it."