Collocations for cautious - adj.

be
become, get, grow
remain
make sb
Her experiences have made her cautious.

extremely, fairly, very, etc.
excessively, overly, too, unduly
He accused the government of being unduly cautious.

deliberately
a little, slightly, etc.

about
cautious about spending money

of
He warned us to be cautious of accepting their statements as fact.

Cautious is used with these nouns:
approach, eye, investor, look, optimism, sip, stance, welcome