How to count to 7 
As you all know, you may not make back-to-back posts in your own promotional book threads, unless 7 days have passed between. Here's how you count that.
If today is the 14th, you can post again on the 21st because 14 plus 7 is 21. Or, if you last posted on a Saturday, you can't post again until at least the
next Saturday.
ANY post counts. . .even just a 'thank you'.
And if someone else posts, you can then post any time and the count will start again with your new post.
We don't get too particular about what time of day you post, and do understand that, as we are now international,

there may occasionally be date line issues. But, in general, if we see your next-to-last post is a date that is not at least 7 days before the date of the last post, we may delete it without warning.
If you have news and it's not been 7 days, and no one has posted in the mean time, you MAY modify your last post to add the new information. This will not move the post to the front page, but it will reset the 'new' tag -- and LOTS of our members browse that way.
Also, when you post, or even when you aren't yet eligible, you can still change the thread title with the modify function by editing the first post in the thread. (See prior
reply.) That may call attention to your thread for those who browse thread titles visually.