TRICKS: I added some flower seeds into the combo pots, so that new things keep sprouting up through the season.
...Also, I mixed a climbing vine (cardinal vine) into a hanging basket, so it goes up and hangs down at the same time...AND in a neglected back area, where I know nobody will water, I planted seeds only of drought tolerant flowers like zinnia, cosmos, and marigold. They are big and blooming now without much care.
Each year, I try new combinations...this year I was trying to avoid yellow, blues, and whites. Maybe next year I'll do the opposite...we'll see.
I like to plant pots with stuff that gets huge. For something experimental, I planted this obnoxious turquoise pot with a variegated Japanese corn!