Work on the "ear as much and as soon as possible. I neglected that for the better half of the time I spent learning the bass and I regret it. Just turn on what ever you listen to and try to hit notes that you hear. I found that a device by tascam to be a great asset. It's a cd play that you can line out to your amp, and plug your bass right into it.you can loop a section of the song and have that repeat then you can slow it down to catch every note. Some people don't like it, I love it. THe greatest tool I ever got. here's a linkhttp://www.tascam.com/Products/cdbt1mkii.htmlI have the old one, this one adds one or two things and I believe it's easier to use not that the one I have is hard to use, it took about 5 min to learn.
yeah, i have this too. it really helps.