To exercise precaution; to be careful with regards to the situation; to tread lightly.
tread lightly
To proceed carefully; especially, to seek to avoid causing offense.
easy does it
Relax; do something gently, lightly or carefully; slow down; calm down …
foot voting
Expressing one's preferences through one's actions, by voluntarily par …
vote with one's feet
To express one's preferences through one's actions, by voluntarily par …
walk on eggshells
To be overly careful in dealing with a person or situation because the …
keep a close watch
to pay careful attention to a situation or a thing, so that you can de …