Use a stud finder and move it slowly across the wall
Tap the wall and listen for a solid, less hollow sound
Look for electrical outlets, which are often attached to a stud
Measure 16 inches from a known stud center to find the next one
Check baseboards or trim for nail patterns that may indicate stud locations
Use a small finishing nail to probe discreetly if needed
Verify the stud by finding two edges and marking the center
Confirm with multiple methods before drilling or hanging anything