I still use this daily - and you can have it for FREE!
My Secret Sauce
This two-sided, printable PDF has all the SketchUp and V-Ray information you need to help you model quickly and efficiently! It includes the following:
SketchUp Shortcuts + Keys
Feet to Inches Conversion Chart
Fraction to Decimal Conversion Chart
Standard Window and Door Dimensions
Common Kitchen, Bathroom, and Interior Measurements