Watch the Vitamin E online guitar lesson by Corey Congilio from 30 Beginner Blues Guitar Licks You MUST Know
Here's a nice key of E lick with a healthy dose of vibrato. The vibrato in this example is played with two fingers, which we'll be talking a lot about in this example. I can't stress it enough, spend a lot of time on this technique. Good vibrato will really help your playing sound authentic.