1: PRACTICE (till you almost hate the bass)
2: Play music with other people, no matter how much you feel you aren't good enough to play with them. Band interaction is the best teaching tool.
3: Listen to music that has distinct bass playing and observe how their playing works around the music. Also just enjoy it. Try these albums:
A) Double Nickels On The Dime- The Minutemen
B) Mingus Ah Um- Charles Mingus
C) Introduce Yourself- Faith No More
D)Unkown Pleasures- Joy Division
E) Undertow/ Aenima- Tool
You don't have to listen to bass virtuosos, just stuff where the bass does the job of supporting the band while at the same time remaining a separate and distinct instrument.
4: Pick out some of your favorite songs and learn them. Also occasionally learn a song that challenges you. If you can, watch music videos, preferably live ones, and watch the bassists style and technique and then try it out yourself. Find what style, techniques, and sound works for you.
5: Importantly, remember to have fun with it and view it as a constructive endeavor.