You can shift Cells Down in Excel by right-clicking, clicking and dragging, via the Home tab, using Shift-Click-Drag, Right-click and drag, Inserting copied cells, etc.

Select the cells containing the decimal points you want to line up. Hold "Shift" and click to selects adjacent cells, or hold "Ctrl" and click to select non-adjacent cells.

You can split cells into columns in Excel using the "Text to Columns" tool, which is a great way to organize lots of data.

Although Excel 2013 offers many options for performing calculations in new cells using data from existing cells, sometimes you want to work on data in the original cells.