Solving Sudoku puzzles made easy (part 2)

Next you write down all the numbers missing from the first two columns (2,4,6,8,9 and 2,4,8,9). I chose those two because those columns are already reasonably well 'populated', you can start with whichever rows or columns already have the most numbers in them.

The only number that can go in column two, row six is 8. There's then only one place the 8 can go in the top-right box
We know that the 6 in the first column can't be in the bottom-left box so there's only one place that can go as well.

For future reference, make a note where the 2,4 and 9 could go in the bottom-left box.
Full series here.