people,people,people
DON'T just put in a larger breaker. Breaker/fuse size is determined by size of wire used, its insulation type, electricle divice it is feeding and finally what its intended use is. Electricity is oderless, invisable and deadly as hell. I am an electrician, it takes 5 years to complete the apprenticship in my area, and even with all the training and specialized tools and procedures electricians die because of it. I am amazed and appaled at all of the bogus advice that has been generated from this post. As much as I would like to single those with the most damaging advice I will suffice with this, get an electrician.
The National Electric Code is updated every 3 years, there is a reason for each and every rule. The NEC is there for two reasons to protect people and property. Electricle modifications to a existing structure are not as simple as you may think it is, or it may be, my point is that unless you understand the whole system you can't possibly make an informed decision. If you wire something improperly you may Kill Yourself or worse some one else. You may burn down your house and your neighbors with it.
If you are opperating on a shoe string budget, get estimates, go to a jobsite and see if any of the electricians will do some side work. Adding a subpanel or an additional circuit or two is not as expensive as you may think.
Hope this helps