Create a form solely for inputting data?
If you enter design mode on your entry form, open up your properties window and select the form object. You should find a property called "Data Entry" which you should set to "Yes." This removes the link to all data from the related table and will only display blank controls. You can then have your user enter data directly into the form. I believe the default adds the data to the table when they exit the last control in the tab order.

There are also options in the same properties pane for the form that allow you to switch off the record navigation buttons.