This is a selection of examples from the complete
"How to" screencast. »
The spreadsheet

is included in the
Mathematica documentation folder ExampleData:
Import the spreadsheet and set it to

:
Display the first worksheet of the spreadsheet

in a grid:
You can also import specific rows and columns of a spreadsheet.
Import only the first 3 rows of the spreadsheet:
Import only the first column of the first 3 rows of the spreadsheet:
Import only the second column of the first 3 rows of the spreadsheet:
Import only row 3 of the spreadsheet: