Microsoft Points

If you want it right now then the best current deal would be to buy them at Best Buy when they have their Save the GST, which will give you 5% off.

If you don't mind waiting then wait for Best Buy/Future Shop to have their seemingly monthly Customer Appreciation sale (FS had one last week that would have gotten you 10% off). These sales have accessories from 10-20% off

Thanks. I tried to buy some during the last BestBuy Customer Appreciation sale but the MS points were not discounted (and then I forgot about it!).

I think Best Buy's last sale they were not discounted as they were advertised in the flyer. Future Shop had a sale a week later where they were though

Are these sales random or based on some schedule?

I used to think it was every few months, but there certainly were quite a few over the summer.