In @wrannaman's post he says he's going to stop throwing up cheap crappy MVP landing pages because they don't work. He's right that the world is already full of validation landing pages. But putting up a landing page to test demand should only be one method of validating our ideas, and there are others we can use.
You start with a hypothesis: "people will find & pay for this if I build it". You want to prove this hypothesis wrong as early and cheaply as possible so you don't have to waste time and effort building a failed product. If you can't prove it wrong, then you build it.
From listening to the IH podcast and reading founder blogs I've made a list of questions that have worked for other people for validating (or falsifying) business ideas:
To find out if there is social media chatter we can search Reddit, Facebook and Twitter. I've found that a Twitter search for exact terms in quote marks with "latest" sorting order gives clear results.
If you know people who need the thing you're building then you can talk directly to them.
You can also build a landing page and see if you can get signups for the idea. But don't only do that. Use multiple methods to validate, and follow those ideas which validate on more of them.
What other methods have I missed that are good for helping us validate?