The best way to hunt pheasant if you don't have a dog is...
GET A DOG!
Sorry had to do that.
I would say fence rows, edges and corners of cover if you're hunting alone. Remember you have to give them the squeze play. If you don't have walkers and blockers you have to drive small areas of land into open areas to make them stop running and start flying!
If you are in a group I would walk a little tighter and drive slower. Also I would stop every once in a while and just stand there. Sometimes the birds get used to being pushed and will sit tight for you to go by and they find if the don't fly the don't get shot at. If you stop they may think you spotted them and take flight.