This is the minimal list of links that I think you need to get up and running with node, express, and a fully functioning node site.

Node.js homepage
This is the beginning. Node.js actually runs your javascript file. It’s the interpreter runtime. 

Express.js
Express gives you Sinatra-like routing. It gives you the baseline to be able to run a functioning web app.

Mongoose ORM
Mongoose gives you pretty syntax for accessing MongoDB models. It can be your data layer. 

NPM
it’s a package manager like gem or CPAN for the node universe — install, compile, update all from one command line. 

NPM module listing
listings of useful NPM projects, super useful.

Advanced Topics

socket.io - easy realtime long polling library

coffeescript - beautiful syntax for javascript — you can write an entire node project in coffeescript. Worth +10,000 elegant hacker points.

(Source: decodering)