There are a number of good online tutorials available for searching Ovid, CINAHL, PubMed, RefWorks, etc. and for the Library Catalogue.
Also, check out the How Library Stuff Works - video tutorials
Contact the Health Sciences Library Information Desk Monday - Friday from 9:00 am to 5:00pm at 905-525-9140 ext. 22327 or by email (firstname.lastname@example.org).