Open up audio for the riff and follow the tabs. Open the song that you're covering in another window on your internet browser. Play through the song and trace the chords and notes with the tab that you looked up. Try to follow the numbers on the tab with the notes that are being played in the song. Try to get an understanding for which chords the artist is playing before trying to duplicating it.
Justin Sandercoe has thought long and hard about how to teach people to play the guitar, and how to do this over the internet. He has come up with a well-designed series of courses that will take you from nowhere to proficiency. I tried to learn how to play years ago, using books, and got nowhere. I've been using Justin's site for just over a year and I feel I've made real progress. What's more, Justin offers his lessons for free - a boon for any young player who has the urge to play, but whose pockets are empty. I've seen and used other sites for learners: none of them offer as clearly marked a road as Justin does.
These lead guitar lessons cover everything you need to know in order to get started with playing lead guitar. You'll learn things like: proper hand technique, the Major Scale, the Major Pentatonic Scale, the Minor Pentatonic Scale, bending technique, vibrato technique, legato technique (hammer-ons and pull-offs), and even how to play your first guitar solo! So, whether you are brand new to playing lead guitar or just want to sharpen your skills - these lead guitar lessons will help.