Fusion power has always been deemed impossible, or at least difficult, because it is very hard to keep the reaction self sustaining. However, I have figured out a way which I THINK might work.
Inside of a fusion reactor, have a uranium pellet with fusion fuel inside. As fission occurs, the pressure and temperature inside of the core will be enormous. This will result in fusion, releasing a neutron to further bolster the fission reaction. This will raise the temperature of the entire core with less fuel, thus becoming a more efficient method of power generation. What do you think?