Sometimes, the page doesn't always distribute content as nicely as you'd like. Here are tricks you can try to get better distribution.

By adding some blank lines to the end of the last article on the page, it forces the page to reshuffle and often results in a more desirable layout. These blank lines will be remove on mobile devices, so won't result in a big blank space.

Sometimes, if a page is not looking desirable in a 3 column layout, it may look better in a 2 column layout (and vice versa).

If there are galleries or videos on the page, sometimes slightly adjusting these can resulting a more desirable look.