Hummigbirds, first start in close to your feeder, back away a little at time until you figure out how close you can be and the bird will still come. Usually for me it's about 12 feet.
Use AF.s and burst mode, Focus on the feeder perch.
As soon as the bird gets close to your position start your burst. You should be able to lock onto the hummer.
The bird will fly in and out of your focal plane. Don't lift your finger off the button until it leaves.
I set up a tripod with the head tightened just enough I can still move it with a bit of force.
Plan on being out there at least a half hour and don't leave until you get what you wont or the Hummingbird stops coming.
Try and get a minimum of 1/1200s, 1/2000/s is better. The more DOF you have the better your results are likely to be. You really need to bump your ISO for these guys, to the highest you're comfortable with usually.