Craft Eyes of Ender using blaze powder and ender pearls
Hold an Eye of Ender and use it to locate a stronghold
Follow the direction the Eye of Ender travels
Throw another Eye of Ender after moving a short distance
Repeat until the Eye of Ender starts going downward
Dig down carefully where the Eye of Ender drops
Search the stronghold for the End Portal room
Look for a room with a lava pool and a silverfish spawner
Find the End Portal frame blocks around the portal
Place Eyes of Ender into each empty portal frame
Activate all 12 frames to open the End Portal
Jump into the portal to enter the End dimension