Definitions: (1) studied and intentional action characterized by or resulting from careful and thorough consideration; done on purpose; premeditated; (2) aware of the consequences; (3) slow, unhurried, and steady; allowing time for decision for each individual action involved

Synonyms: cautious, thoughtful, voluntary, witting

• Whilst we deliberate how to begin a thing, it grows too late to begin it. — Marcus Fabius Quintilianus [aka Quintilian] (c. 35–100 AD) Roman educator & rhetorician
• The great enemy of the truth is very often not the lie, deliberate, contrived, and dishonest; but the myth, persistent, persuasive, and unrealistic. — John Fitzgerald Kennedy (1917–1963) 35th president of the United States

Suggestion: Take as much time to deliberate. The more complex the problem, the more care should be taken. Ultimately you will know when to take deliberate action.