Love for the Bundle of Holding here. If you’re reading this around April 2014, the Indie Bundle has reappeared, and you should grab it because (a) it’s cheap, (b) it’s for charity and (c) it’s a collection of very interesting games you might otherwise not have heard of.
Of course if you like more mainstream stuff, they do that too as well, normally with complete collections of genre- or product line-focused stuff for a really good price. While you’re buying your Indie bundle, why not sign up for the mailing list? Jolly good.