How do I identify identify if a resistor is 300 or 1k?
To answer your question:

300 Ohm colors are - Orange - black - brown

1 K Ohm colors are - Brown - black - red

Here is the color coding chart to determine the resistor values
 Resistors with four bands are > 1% tolerance resistors. Resistors with 5 band are 1% tolerance resistors.

First three bands determine the value of the resistor.

Fourth band is tolerance of resistor (if only 4 bands on resistor)







If you deal with resistors frequently and don't want to learn the code, prepare to invest in a multimeter that would tell the approximate value of a resistor.