Do you need/prefer to be in a specific context when doing the weekly review? I presume it would be easier to handle '30-second tasks' that come up when you are in/at the context most of your work is handled.
Or should your system be set up so that your WR could be done anywhere you like, @Home, @Work, @Commute(*), @Beach, @Garden
@Garden might be the best place for your 3.000m(**) and up review
(*) Assuming non-car commute, of course.
(**) Go "Metrics"!