There are two ways to reach this peaceful town.
One is hicking from Manarola... From Manarola to Corniglia is perhaps one hour of good walk.The trail is quite easy to follow,the view is pleasant and you can always stop at the small rocky beach to take a dip and have a little snack.
The other way is to travel by train....Unless you have strong legs and like to climbs the steep steps that will take you to the village, you must then take a bus at the station to reach the center of the town.
Here's a pic of Corniglia from the high hill top road. At the end of the headland you can get wonderful views of the coastline.
One of the great things about visiting other places is seeing the locals doing ordinary things. We took this picture right off the trail as we walked through Corniglia.