Abductions of business executives are on the rise. Some 784 abductions were recorded during the first half of 1998 alone, reports Hiscox Group, a Lloyd's of London insurer. The South America nation of Colombia accounts for half the world's total. But Russia is another country where business people are at considerable risk. The insurer offers these personal tips to reduce the risk of kidnapping: Don't wear an expensive watch. In bars and restaurants, watch your drink being poured -- and avoid ice. And never tell a stranger you have ransom insurance.