I LOVE 1 Corinthians 1:30, which says God has made Jesus Christ "our wisdom, that is our righteousness, holiness and redemption."
I got to reflect a little on it in last Sunday morning's sermon on Solomon in 1 Kings 3(click here). A great, practical way for how to be wise is to ask in every situation "what would it mean for me to act in righteousness and holiness here? What would it look like to act out of redemption in this situation?" That's wisdom.