Grape tomatoes are really easy and yield alot. They'll keep producing for a few months. I made the rookie mistake of planting too many I had way more tomatoes than I knew what to do with.
What I did was turn over about 1ft deep of soil, mixed in scott peat moss (or something like that) with soil.
Make sure to follow spacing instructions, some of these vegis really grow..
I also did cucumbers, basil, eggplant, peppers and other tomatoe variations.
Cucumbers are aggressive and attacked everything within 3 ft of them.