in a word... you don't. you would have to run new romex (ie wire) rated for the amperage you wanna carry. that would most likely require some demo'ing of walls depending on how your home is setup. possibly replace each outlet with ones rated to handle 20 or 25 amp load (your std wall outlet is only 15amp). also upgrade the breaker to match.... In other words, the whole system works together, and you can only carry (safely) as much load as your weakest link. thats why you can't just pop in a higher breaker without considering the existing wiring, etc.

In summery, you would pay an electrican a far amount of money to do this. In most cases, it would be far cheaper to have a new circuit run to carry the load you need than to try and bring an existing one up to the task.

-Rob