I always enjoyed going out daily and hunting them down. Hopefully you're not talking about acres of tomatos, just a few plants? I take a bucket of water with me and when I find them I pinch off the stem they're on and drop them in the bucket! After you've done it for a few days, eventually you'll find them all. Hint for finding them: look for bald stems! And my mother always said, "where you find one, there will be another!" They usually come in pairs....and sometimes their babies too if you don't get them before they lay their eggs. Check the underside of leaves too. Good hunting!