Choosing a breadboard: powered or externally powered?
An internally powered board may be more convenient, but an external power supply can be more versatile. Whatever supply you use it should be current limited to 1A or less, and if voltage is variable then a display is essential. An ammeter is also very useful.   

That Sun Equipment PBB-4060B look dangerous to me. 5V @ 1.5A and variable +-16V with no voltage indication. Most modern chips run on 3.3V or less and are easily cooked by over-voltage.