Venus, brighter than all other planets and stars, will dangle just below the thin crescent moon in the southwestern sky. It'll be visible -- impossible to miss, in fact -- just as the sun goes down, assuming skies are cloud-free.
Soon thereafter, Mercury and Jupiter will show up hugging the south-southwestern horizon (just above where the sun went down) and extremely close to each other. Jupiter is very bright and easy to spot; Mercury is faint and harder to see, but it'll be apparent by its location just to the left of Jupiter.