The number one thing you can do to become a better searcher is to used the advanced search options. Most databases and search engines offer them. Advanced search lets you apply filters, make better use of your keywords, and limit your results to more relevant material.
Just take a look at Google's advanced search page. You can search by keyword, exact phrase, or number range. You can limit by language, region, or file type. All of these options mean that your search is more targeted which brings back better results.
Going advanced saves you time and frustration.