High dividend yields are often a sign of trouble, which makes Enbridge's 5.6% yield very interesting.Investing for dividend income is often a test of patience. It can take years for a portfolio of dividend stocks to compound into the avalanche of income that can pay your bills, a dream for many people.Therefore, investors should typically select dividend stocks based on their long-term prospects. Be warned: Building that dividend income isn't about chasing the highest yields. Those stocks are often yield tr ...