The main object that you may find yourself needing to import into Salesforce is Contacts.

Whether is a series of business cards, or a list of employees from an organization -- you may find it more efficient to IMPORT data via an import file - then to Enter the records one at a time into Salesforce.

Luckily Salesforce has native data management tools that are available to HandsOn Connect that make it easy to import (as well as to update) data records.