Some simple genius ideas and tips on simple genius app-building from 37 Signals in their book Getting Real. Check it out here. Most lessons apply not just to development but life / work productivity in general too.

A couple of my favourite snippets:

‘The more massive an object, the more energy is required to change its direction.’

‘Simple rules… lead to complex behavior. Complex rules, as with the tax law in most countries, lead to stupid behavior.’