As far as technique goes the only thing that I would say is to take your time developing finger strength and dexterity. I t is very important that your fingers are able to move along the fretboard freely and that you r use all of your fingers on your left hand. Over the years I have noticed that there are many bass players that do not use there pinky finger when playing. I know that it is something that you have to get used to, but it is very important that you do use it. When it comes to playing things like "shout music" and very fast runs you will see how important that it is to use it. Another tip I would give you is learn all types of techniques. Dont just limit yourself to the traditional two finger playing style, but learn other ways such as slapping, plucking, thumping, two-hand tapping, muting and three finger playing. This will be beneficial if you ever have to solo, the reason being you will have so may ways to solo you will no t be limited to play just one particular style.
I hope I have given you somethings to think about!