cross-pollination in SFG

I have two questions about this. I know some varieties of things need to be cross pollinated in order to set fruit.

With square foot gardening, what would be the better way to plant them to ensure cross-pollination? I'm going to take an educated guess and say vertical planting?

By vertical planting I'm NOT referring to growing them upward and having them climb up a trellis, like you do with some things in SFG so there is more space (squash, melons, etc.). You would basically place the plants vertically in the boxes, as opposed to horizontally, where with horizontal gardening they're grown left-to-right in a straight line.

My second question is what exactly requires cross pollination? I have a list of things listed below that I believe need cross pollination to get a crop, but I'm not sure.

Berries (strawberries, blackberries, raspberries, blueberries, cranberries)

Tomatillos (a Mexican variety of tomato that is green and grown in a husk; when it's ready to harvest, the husk splits)

Corn

Cape gooseberry

Please clarify regarding this; thank you.

I am not understanding your description of vertical gardening but I will address some of the pollination issues.

Corn: this plant is generally known to benefit more from wind pollination vs. a vector, or pollinater like a bee, butterfly, bird. You can read more about it here.

It is my understanding that tomatoes, eggplants, tomatillos and cape gooseberries are self pollinating, meaning that there are male and female parts within the flower. These flowers will benefit from vector pollinators but also a simple little nudge of the plant will help the process.

Modern cultivars of strawberries are similar and there is a good explanation here.
With the other berries I would suggest checking which cultivars you're interested in planting, their pollination requirements may be different.

Well according to information I just found regarding tomatillos they are 'self-incompatible for pollination'. This basically means one tomatillo plant can't pollinate itself, and at least two tomatillo plants have to be planted next to each other in order for the tomatillos to pollinate.

I'm wondering if the corn and goose berries are also self-incompatible for pollination? That is the goose berries would require at least 2 plants planted next to each other in order for pollination to occur?

When I say vertical gardening this is what I'm referring to:

Garden corn be planted in several short rows rather than in one or two long rows.

this is specifically in reference to corn, that if you plant using the method described above, it will ensure better pollination. This is because, at least to my knowledge, corn should be planted in 'clusters', having other corn plants next to it, in order to be pollinated.

I'm wondering if this would be the best method of planting to use with plants that require more than one plant in order to be pollinated.

Regarding the strawberries, are there any varieties that are self-pollinating, or do they all require that you have to plant more than one plant in order for pollination to occur?