to think up every possible method;to devise ways and means;to try this;that and the other

to complement one another

warn people by taking oneself as an example

clearly and easy to see;obviously

catch the ball before the bound

Offence is the best defence

First impressions are firmly entrenched

foresight

never again;just this once;not to be repeated

mingled hope and fear

a delight to see;an attractive spectacle

jubilant

Listen attentively

once a use forever a custom

pour oil on troubled waters

Birds of a feather flock together

Birds of a feather flock together

cheap and fine;attractive in price and quality

make/create something out of nothing

water without a source, and a tree without roots