Additional Community FAQ's that are not found at http://arduino.cc/en/Main/FAQ :
eg:
How do I pick the right resistor?
How to drive a simple motor?
Why does Arduino not work right with linux + serial?

Q: I can't upload some scripts ( especially large ones), but others work, and I get "stk500_paged_write(): (a) protocol error" reported when these script/s fail:
A: You are using an old OptiBoot Bootloader. Use an ICSP programmer to programm a new bootloader to teh chip, or replace the chip.
references:

• http://arduino.cc/forum/index.php/topic,64105.0.html
• http://aeroquad.com/showthread.php?5691-Cant-upload-to-the-arduino-uno
• http://code.google.com/p/arduino/issues/detail?id=661

Q: Insert your FAQ's with answers here! \\ A: some answer

Q: Insert your FAQ's with answers here!
A: some answer