This is my method.   Don't know if it's right but it is what works for me.   I use three things when I plant:   root stimulator, a banana peel and coffee grounds.   Sounds scary doesn't it? 

So first I dig a rectangular shallow trench in the dirt.

Next I fill the hole with water to which I have added root stimulator according to the package directions.

I let that water drain away entirely.
I lay the banana peel down in there toward the side of where the roots are going to go.  Then I sprinkle a small handle of coffee grounds in the hole.

And then I get ready to put the tomato plant into it's fruity, caffeinated home.

Banana peels add potash and phosophorous to the soil.   Coffee grounds add nitrogen.   I often do not fertilize my tomatoes at all during the season but simply bury another rotten banana (or peel) and add another small handful of coffee grounds periodically.   I buy packages of rotten bananas at the grocery store for around 25 cents for 7 or 8 of them.   It's only my husband and I at home now and it's hard to eat enough banana for the garden.
Next time I'll show you how I actually plant.