Is your vehicle stock ride height? If NOT, then you need to modify the end link sleeve length to compensate. Longer if you're lifted, shorter if you're lowered. The correct endlink length is th eone that allows the bar end to sit parallel with the lower control, with the vehicle sitting level,on the ground, at ride height. Anything other than this creates "pre-load" on the swaybar, and will cause premature failure of the bushings, not to mention having a negative effect on handling. This applies to both the front and rear; although adjusting the endlink length on the rear requires fabricating something or cutting/welding the stock link.
I would also recommend using Energy Suspension polyurethane endlink and frame mount swaybar bushings. Better handling and they last longer.
I just saw you are in Florida. Keep in mind that the heat/salt water is also going to more quickly deteriorate stock-style rubber bushings.
Also, overtightening the nut(s), and "squashing" the rubber biscuits will kill them pretty quick.