Adjectives

(a)heedful, attentive, thoughtful, paying attentiontaking heed; giving close and thoughtful attention“heedful of the warnings”, “so heedful a writer”, “heedful of what they were doing”
(s)careful, heedfulcautiously attentive“careful of her feelings”, “heedful of his father's advice”
(s)advertent, heedfulgiving attention