By William Crum wcrum@oklahoman.com Staff writerThey said it"There’s no wasted time in my day."— Oklahoma City Mayor David Holt, commenting on his social media profile and his selection to appear on a social media panel at the U.S. Conference of Mayors' 88th Winter Meeting this week in Washington, D.C. Holt said his approach is somewhat unique among mayors in that he does his own posts and uses social media for two-way communication.