I start with actors that I know personally or I know their work, and there are things about their work or their presence or their own personality that make a character, that exaggerates some qualities and suppresses other qualities. It's always a real collaboration for me.
I prefer the countryside to cities. This is also true of my films: I have made more films in rural societies, and villages, than in towns.
Use a make-up table with everything close at hand and don't rush; otherwise you'll look like a patchwork quilt.