One best practice I insist on is codefile headers, especially since VSS makes this stupid easy.  Below is the format I currently use for C#.NET:

 

#region Version Header

/// <remarks>

/// ----------------------------------------------------------------------------

///   Application: XXXXXXXXXXXXX

///     $Workfile: Default.aspx.cs $

///   Description: Start page for XXXXXXXXXXX.

///        Author: Frank Hagen

///       Created: 11/22/2006

///     Copyright: © 2007 XXXXXXXXXXXXXXX.

/// ----------------------------------------------------------------------------

///      $Modtime:  $

///     $Revision:  $

///   Mod $Author: XXXXXXXXXX $

///  VSS $Archive: /XXXXX/XXXXX/XXXXX/Default.aspx.cs $

/// ----------------------------------------------------------------------------

/// </remarks>

#endregion