Solidity Docs should probably be your first stop when learning smart contracts.

Consensys has a bunch of resources on their website and github including their Smart Contract Best Practices.

OpenZeppelin has a github that is full of hardened and tested contracts.

Decypher Media is an awesome feed of videos put together by Jordan Leigh

Epicenter is “a show about the technologies, projects and startups driving the cryptocurrency revolution”

Reddit: r/ethereum r/ethdev

Network stats:

List of DApps: stateofthedapps

A good list of dapp resources

A newcomer to the scene is delphi