Leveraged closed end bond funds are an option to get close to 6% with the added benefit of diversification (but the disadvantage of management fees, but the 6% yield are AFTER subtracting the fees): http://cef.morningstar.com/quote?t=FCUSA0004E&ops=&p...

Personally I have a diversified portfolio that yields about 6%, with corporate junk bonds (US and emerging market), emerging market sovereign bonds, business development companies, REITs, mREITs, and international high dividend stocks.