A: Colic is a very vague malady to begin with. Most experts believe it is a combination of an immature gut and an immature nervous system that lead to a crampy and fussy baby for the first three months of life. No matter what you do, the most effective treatment is time. In other words, colic usually gets better by three months of age.
You can try anti-gas drops or products (ginger or fennel) that "calm" the intestines or products that provide additional "good germs" that digest food (probiotics like Lactobacillus reuteri), but none of them are 100% effective. The only thing I would advise is to consult your pediatrician to make sure the colic diagnosis is correct. About 30% of kids who are diagnosed with "colic" actually have a milk allergy or acid reflux.