I can't recommend the email notification, as it tend to be pretty late. At least in my case. The gap between a news or sale announcements and the receipt of an corresponding email can be up to 9h, just like the last one.
I found a better alternative to the email notification: Subscribe to the RSS feed of the front page. This way you don't miss the Wednesdays or special sales either. Here is the link:
http://www.gog.com/en/frontpage/rss In your case I would recommend to subscribe to the RSS feed via a Gmail account. This way you can check the latest GOG news with your mobile, too, without wasting much bandwith or time in loading GOG's Frontpage.
And most importantly you should not forget that GOG is a company based in Poland. Take the time difference to your advantage. Most news or sale announcements are published around 12 o'clock (high noon) Warsaw time. The time zone difference between Poland and USA goes from -7h (NY) and -10h (LA). (I'll just ignore Hawaii for now ;-)
So if you check the news feed / emails between 6am and 8am you shouldn't miss a sale again.