Honesty is the best policy...
But lying can be remarkably practical and effective as well.

The grass is always greener...
Well, maybe not in California lately

If you don't have anything nice to say...
Spew torrents of scornful vitriol instead

A journey of a thousand miles...
Begins with TSA Security

Life is like a box of chocolates...
Well, no, not really

Some say the glass is half empty.
Others say the glass is half full.
I say the glass is shattered and the contents have spilled all over the place, making a terrible mess.

Early to bed and early to rise...
Wow, your life is boring