U, V, W
United we stand, divided we fall.
Variety is the spice of life.
Waste not, Want not.
What you lose on the swings you make [gain] on the roundabouts.
Well begun is half done.
While [Where] there is life there is hope.
X, Y, Z
You can lead [take] a horse to water, but you cannot make him [it] drink.
You can't have your cake and eat it (too).
You [One] cannot make an omelet without breaking eggs.
You cannot teach an old dog new tricks.