Management of aircraft is quite a time consuming and energy draining task.You have to keep track of all your expiries(medical,IFR and BFR,inspection checks,ELT,Transponder,SBs,AWDs,etc).Then there are the operating costs of individual flights and maintenance costs.Quite a number of software resources are available but I find this resource http://beam.to/hewa1 rather effective.Actually potential engine problems can be detected beforehand and dealt with.Every aspect of aircraft management seems to be covered here especially for private aircraft owners. 
