These programs will save you hours--literally!--of time. Citation management software can store all your articles and reformat them to meet the requirements of just about any journal. Just remember to proofread your works cited (or bibliography or references) page in case a citation wasn't formed properly in a database.
When using a citation style be sure to refer to the Instructions for Authors for the journal.
Also, if you are using EndNote Basic make sure to add this style to My Favorites for easy access in MS Word.