Use a Qibla compass
Use a Qibla finder app
Check an online Qibla direction tool
Determine your location and the direction of the Kaaba in Makkah
Use a map with a great-circle line from your location to Makkah
Ask a local mosque for the correct direction
Use the sun or stars as a rough directional guide
Verify the direction with a known Qibla marker in a mosque