Projects to Pursue while Studs are Bare?
You'll need to install hard-wired smoke alarms to meet current residential code. This requires three-strand+ground wire run to the necessary locations -- one in the hallway leading to the bedrooms (carbon monoxide and smoke) and then one smoke alarm in each bedroom. 
Seal any wire penetrations between the heated envelope of your home (such as where pipes and wires penetrate the top or bottom plate) with spray foam. 
Remediate any insect or rotten wood or air sealing problems. Watch for dirty insulation as you pull any existing insulation out. 
You might need to replace your fuse box with a modern circuit breaker box.