What is the best way to find out about deals before they expire?

[CrimsonFury]

I am more interested in things people here have actually tried.

Real answers from people here are usually more useful than search results.

Anyone else looked into this properly?

[Zoe]

I love when a team proves people wrong, but I never know how much of it is repeatable. Was the run actually earned or just a streak of good luck?

[Clever Wrench]

What recent upset felt most real to you rather than fluky?