You will immediately notice that it gets harder to find things by search. This feels bad at first, but it is a good thing because:
Gather a list of trusted sites and bookmark them. Always go directly to the site by using the bookmarks.
Try to keep only one tab open. If you have other tabs open ask yourself: do I want to read this now? No: is this something worth bookmarking, eg: reference material? No: is this something I can take direct action on now? No: close the tab. Using this technique I almost never have more than 2 tabs open, and I don't use open browser tabs as some kind of shitty reminder system.