Document and save what you find - work smarter, not harder!
Document your plans, thoughts and choices at the beginning and as you go along including databases used and search terms used in those databases
Use a plain, old notebook or a Word or Google Docs file; maybe you're familiar with Evernote or Dropbox - those are also great places to organize your search process and findings
Save the full-text documents you find - think about how you want to name and organize them
Save citations for sources you think you will use
Consider using:
A matrix to organize your findings (a Word document or Excel template)
Citation management software
Modified from Kent State University's Managing the Review. This is a great source for more detailed information on managing a literature review search.