You will find below a visual diary of some site master planning options – the Divide and Repeat tool was used to layout out the units.

Here is a very concise how-to:

  1. Make a new Mass or Adaptive family (in-place or component)
  2. Draw a Spline
  3. Select it and hit Divide Path
  4. Place a two-point based Generic Model Adaptive family spanning two of the points
  5. Select it, and then click the Repeat button

The images below will tell you more:

Further reading:
Use Divide and Repeat to Create A Curved (elevation) Railing – WikiHelp

I love to see Revit tools used in somewhat unintended ways.  In this case, Jay Holland divides an In-Place Mass Face and applies a Pattern Based Roof Tile to the divided surface – cool!

His sample files (click the download link or the little maximize arrow):

Read more at:
BIM Aficionado: Pattern-Based Curtain Panel Roof Tile

Image from BIM Aficionado