Help, increase towing capacity?

How can I safely increase the towing capacity of my tacoma from 5000 to about 6000? I have been thinking about air suspension and some other mods. Just wondering if anyone out there has any experience with this.

i wouldn't recommend going over Toyota's rating, they have it for a reason, to save lives

Oh come on, do the mods and see if you can tow 10,000. Oh yea, where do you live, want to make sure I stay away from there til you tell us you're truck is out of service.