Harry's tips from December include the following:
Automatic Circles and Sprockets — Bill Townsend — Create a circle by specifying the circumference. The second routine allows you to create a sprocket in which the diameter is based on the chain pitch and tooth count.
Add Batting Insulation — Kent Cooper — Convert an existing entity to a polyline representation of Batt insulation, or create one.
A Better Break Command — Shawn Evjen — Adjust how the Break command works. You will be prompted to select an entity, then prompted for two points at which to break the entity.
Correctly Scaled Text for Plotting — Glenn White — Place text that's scaled correctly for any given plotted height. The text can be placed in model space, a layout, or inside a viewport.
Quickly Restore Named View — Doug Powers— Restore a named view by picking a point near that view.
Run Calculations on Numerical Text and Mtext — Ronald Maneja — Perform mathematical functions on text or mtext entities. You can choose from addition, subtraction, multiplication, or division.