Great [Big] oaks from little acorns grow.
Habit is (a) second nature.
Half a loaf is better than none [no bread].
Handsome is as handsome does.
He who hesitates is lost.
He who laughs last laughs best.
He who pays the piper calls [may call] the tune.
Honesty is the best policy.
If the cap fits(, wear it).
It is never too late to mend.
It takes all sorts to make a world.
It takes two to tango.