It's Sunday evening, you partied too much this weekend, and those doldrums are settling in. Stave off a bummer of a Monday with a whole slew of flowers. Once the sun goes down, stuff a few bills in your pocket and head to the farmers' market on Lincoln Road in South Beach. That's when sellers slash prices to a buck or two a bunch. For a mere $10, you can cart away enough flowers to make your home feel like the abode of a Coral Gables socialite. Or buy roses, which usually go for $5 a dozen. Take them to work and start a spicy rumor about you and your fabulously rich (and invented) lover. Monday mornings just got a little more thrilling.