You might want to invest in a push button circuit breaker instead of a fuse until you discover what is tripping you out. Certainly, one of the biggest causes for high load and fuse blowing is weak connections. Check the screw terminals on your panel outlet wires, and all the negative returns too. If you find loose ones.. give them a good turn.
Another useful device, especially with a blowing fuse, is a laser thermometer sensor. You might be running a load that is just borderline at times, and a wire with full load on it will certainly run hotter than the others. Scan down the panel to see if you can find heat in a conductor, then check the connections first.