There is no way to completely eliminate the chances of developing an aneurysm in your lifetime. That said, by understanding the factors that contribute to this condition, you can reduce your risks. Some suggestions include:
Stick to a diet that is low in trans fats, saturated fats, sodium, and calories. Doing so reduces your risk for high cholesterol,  high blood pressure, and clogged arteries, all risk factors for an aneurysm.
Take steps and receive appropriate care if you have high blood pressure or high cholesterol. Keeping these levels within a normal range is vital to aneurysm prevention.
Engage in regular, low-impact exercise. Studies have shown that doing so can reduce the risk of needing surgery for an existing aneurysm.