Consolidating Student Loans?

Heres the deal, i have about $35,000 in Personal Student loans through Citibank. I'm looking to consolidate all four loans into one thats stretched out over a long period. I plan on paying it back before the 20-30 years ive seen but right now I need the losest possible monthly payments to afford rent and such. Any suggestions of where to go or what to look for? Any help is greatly appreciated thankyou.