The easiest way is to use
Select column A
Edit > Go To > Special > Blanks
than Delete entire rows.
That is providing that the cells are truely empty and don't have a
formula...
You can record this and than use it again.
A trickier way is to do an Advanced filter with the criteria >0
Select column A
Edit > Go To > Special > Visible cells
Copy
Paste on a new sheet