Ah! 
Sorry. Was confused with your blank post. Usually most of them report to the CRA once a month and in those few days after your statements cut. Some are different. HSBC for instance reports to the CRA on the last day of the month. So accordingly, you can PIF a few days before your statement date and let it sit that way with a 0 balance atleast for a few days after your statement has cut. And then start using again until a few days before your next statement date and so on.
A good way would be to pay the minimum immediately after the statement cuts and then almost PIF leaving a small <9% balance on one or two cards and then PIF on all the other cards before the statement cuts. Of course, with HSBC and the like reporters, you would have to PIF before the last day of the month and not the statement date. You would have to watch your CBRs for a couple of months closely to find out when they report. If you subscribe to Truecredit, they show the 'date reported' as well.