If you want to be a node from your personal pc- http://blog.nem.io/easy-configuration-guide-opening-port-7890/

From a VPS- https://forum.ournem.com/tutorials/need-help-setting-up-a-node-do-it-the-easy-way-)/

some info on delegated harvestin- http://blog.nem.io/how-local-and-delegated-harvesting-works/