Deadlifts are always a great way to start a back workout. As with most routines, the compound movements that involve the most muscles should be performed first, deadlifts will add strength to just about your whole body, but you will really feel them hit the lower back and possibly hamstrings.
Maintain good form through out all the reps and go heavy with low reps, you should have plenty of energy as it is your first exercise after warming up and stretching.
Wide-grip pull-ups (or pulldowns) are great for developing that ‘V’ taper in the middle portion of the back. They can be performed to the front or behind the neck which is more risky. Try not to swing or sway when performing each rep slowly and under total control.
Really concentrate on the muscles you are working and squeeze them at the top of each rep.