Peak Atlas DCA75 Pro Advanced semiconductor analyser and the ESR70 esr and capacitance meter. Both saved me lots of time, and they are so fast.
The DCA75pro for testing components. Instead of looking up what kind of discrete component you need to test, the device does everything for you. Basicly its the same as the cheap chinese component testers, but the ease of use, the software and the quality are so much better.
The ESR70 just measures most in circuit capacitors, and even discharges them automaticly. This saves so many time.