Arcturus is the brightest star in the northern half of the sky. It's easy to find in spring in the Northern Hemisphere near the handle of the Big Dipper.
Alphard is the "heart" and brightest star in the constellation Hydra the Water Snake, and it represents a welcome sign of spring for the Northern Hemisphere.
Sirius is the brightest star as seen from Earth and is visible from both hemispheres. It lies just 8.6 light-years away, in the constellation Canis Major.