I hate taking antibiotics too. I will usually drink lots of cranberry juice and also take cranberry tables. These are found in the vitamin section in the store. If I have to take an antibiotic I try to convince the doctor to give me the children's liquid version of it. It seems easier on the stomach/intestines. They won't always do this though...
When I had my son it was an emergency c-section. they accidentially cut my bladder so I ended up with a cathater for 2 weeks. Anyhow they told me I would surley get a bladder infection and uti from the catheter. I was breastfeeding so I was determined NOT to catch either of these(you can't breastfeed on antibiotics) so I drank the cranberry juice and took the tablets. The doctor was amazed that I never got those infections...