Watch the Lick Study 1 online guitar lesson by Jeff McErlain from Beginner Blues-Rock Soloing
This lick is a staple in the blues rock world, the first three notes are almost like saying the word "the" at the beginning of a sentence. It's truly that common. It transcends the idea of cliché, becoming standard vocabulary. Just for fun, in your daily listening see how many times you can spot this lick, off of the top of my head I can even think of about 10 solos that start this way. You get the idea! You really want to spend some time and get this one right.