Cant seem to get off the addiction of soda?

I really want to stop drinking soda because i have it everyday. and i mean EVERYDAY. Its does mini sunkist sodas and i have full ones sometimes too. i want to just stop and not drink it but my mom buys 2 packets of the thing every week! i told her to stop but my dad drinks them sometimes for work and my mom does also. but not everyday... like for company.. but when dinner is ready my first thing is SODA! and than when theres no soda i get all mad..... im addicted to soda!! help! tips? advice? ??