Someone mentioned bugs on their tomato plant...try growing marigolds around your tomato plant. The scent of them chases away many bugs that like tomato plants.
And ppl have mentioned herbs, basil...but what about all the others? If you're interested in doing this, I would recommend a several plants to get you started with a basic herb "garden."
Basil - annual
Rosemary (upright) - perennial
Thyme - perennial
Oregano - perennial
Sage - annual
Chives - annual
Parsley - annual
Mint - perennial
Cilantro - annual
Those plants that are perennial will last you several years. Those plants that are annual you can collect the seeds and then replant next year!
Easily done in small containers, or put several of them in one large pot.
Hints: Don't plant mint with anything else or in the ground. Mint is VERY invasive and will take over an entire garden! Collect the cilantro seeds and save some to plant, and then use the rest in the kitchen (coriander)! Get flat leaf parsley versus curly parsley. (Curly parsley is usually that garnish you find on your plate at the restaurant.) When using fresh herbs in recipes, remember that the ratio is 3 to 1. I'm not sure about other states, but in CA, if you're on food stamps you can purchase herb plants, vegetable plants, and seeds with your EBT card. Check your state rules to see if this would work for you!!! Slice a handful of basil leaves and toss them with your salad for a special "bite" that can't be beat!
Fresh herbs are easy to take care of, economical, beautiful, and taste great in your food! Not only that, but gardening gets you outside and burns a little bit of calories too!