I've been reading the day trader forum and watching their...

I've been reading the day trader forum and watching their recommendations. Stocks that is about to go ex-dividend tend to increase until the ex-div date (I'm guessing because people are buying to get the dividends?). They then seem to dive (current price - div price) and either quickly (or slowly) recover.

The questions: is there a master list of companies that are about to go ex-div or do you simply need to keep an eye on all the announcements released on the ASX? Is this a fairly accurate way of finding companies that may go up?

Anyones thoughts would be greatly appreciated.