Keeping track of sources while performing research will save you time and energy.
While everyone must establish their own routine to get organized, many people benefit from using an online [mostly free] reference manager like Mendeley or Zotero.
Alternatively, you can keep a research log to track keywords used, databases searched, articles downloaded or read, and notes -- either in a program like Microsoft Excel, Google Sheets, or simply by using a notebook or index cards.
Remember that research is messy. You have the power to help control the mess by employing some kind of research management techniques. By managing your research, you will save time during the research process by not repeating your searches. If you keep good enough notes, adding quotes and citations will be a snap.