Ignition misfires tend to happen under a load. The best way of isolating the cylinders is by a cylinder balance test as already posted above. You can do this via a good scan tool or by following the same practice Eric shows in one of his video’s.
A good scan tool will also show you how many misfires each cylinder has had if you jump deep into the scan tools functions.
You could possibly start diagnosing the issue your self by stress testing the ignition system by using a good brand adjustable spark tester. I would also be looking at fuel pressure issues as well as vacuum leaks. Again the correct tools will make diagnosis alot easier.
For the compression test, just complete one cylinder at a time. I would pull the fuel pump fuse so the vehicle will not run nor flood the engine of raw fuel.
Hope this helps.