It is always a good idea to try to save your search strategies, as well as any interesting articles that you might find with those search strategies. This might seem like a lot of extra work at first, but it will actually streamline your work processes if you aren't duplicating searches needlessly. In addition, the theory of evidence based practice puts great importance in someone else being able to replicate your literature search.
The easiest way to track both searches, as well as articles, is to do so within the database itself. Here are some examples:
CINAHL: create a personalized My EBSCOhost account. This allows you to create folders where you can save articles to refer to later.
PubMed: create a personalized MyNCBI account. Refer to the MyNCBI page of this guide for more information.