Reference management programs (also known as citation managers or bibliographic management software) provide many useful features that can help you with your research such as:
Make a habit of storing all useful references to research literature as you come across them. This practice will save time later when you are writing.
As there are a number of different programs available it is important to choose a reference manager that adapts easily to your way of working and lets you establish an efficient workflow.
Cost - Is there a cost involved?
Desktop/Online- Will you want to access the tool both off and online?
Storage - How many references and attachments (such as PDFs) can you store?
Word Processor - Is the tool compatible with the word processor you use?
Reference Style - Does the tool format in your preferred style?
Advantages - Does the tool offer specific features that meet your needs?
Support - What level of support is available?
More questions:
Reference management tools help you store and organize references from different databases and create in-text-citations and bibliographies.
The University of Melbourne:
University of California (UCLA)
See comparison of reference management software in Wikipedia.