谋 is more like "strategize" and "scheme" than "think", there's a certain connotation associated with it that limits its scope.

Both 思量 and 考虑 as suggested in the blog do not work too well as mottos, I feel, as they lack in simplicity and elegance and work better as part of a complete sentence. 思考 is OK, but just 思 (as mentioned in one of the blog comments) could be even better.

Might not be appropriate, since when I see "谋" I associate it with "conspiracy".