Most times when Apple hardware breaks, it's generally a trip to the Genius Bar or an authorized Apple Repair location. However, Apple severely restricts what can be repaired onsite due to intentionally restricting spare parts. Additionally, the experience typically costs the same as when purchased new to fix. Rossmann Repair Group in Manhattan, NY bypasses all of this, providing excellent service, expert troubleshooting diagnostic and capable of repairing anything on-board. They also resell all of their high-end soldering equipment and supplies at store.rossmanngroup.com.
Quick shout-out to Apple for their 'Families' program that just launched. These types of protections for children are important for the digital world. Apple definitely isn't the first to publicize, Microsoft similarly has offered good family protection for some time.
Titanium Software's OnyX is a free utility that cleans and optimizes most versions of Mac OSX. Additionally, OnyX pulls and displays important information about system parameters.