Online privacy defense is really up to you. Your options are none, little, some or a lot. 

This article is short. In fact, it is just a link to a recent posting on Make Use Of. The article is The Complete Guide to Improving Your Online Security and Defending Your Privacy, by James Frew. He has written a short overview of things you should consider and some options for doing so. While arguably not “complete”, it provides a great 30,000 foot view of major security and privacy issues and remedies. Worth reading.