I'm wondering if there's a command in Vim I'm missing that does columnar motion. What I'm thinking of is common in some spreadsheets, where there's a key combination that will take you downward in the column to either the next blank cell, or if you're in a blank cell then it will take you to the next non-blank cell. Some text may illustate:
a-------
-------
-------
b-------
c-------
-------
-------
d-------
e-------
-------
What I'm looking for is most efficient way to move from a to b, from b to c, from c to d, from d to e. I know this can be done using / searches, but is there a more efficient way using something analous to the line-based motion commands? Seems like there should be, but I can't find it.