Meticulously document information that you find useful. Pasting a bunch of links into a document and making sense of them later will be counterproductive. Use a spreadsheet to track relevant sources and why you found them helpful.
Copy this spreadsheet into your Google Drive to track what information comes from each source you find.
Use persistent or permalinks. Copying the URL from the browser won't always reopen the search results.
Adopt a group file-naming convention to make your documents easier to search