Best way to fertilize/feed tomato plants organically/naturally???

All of the above are good. You are on the right path. Compost is your best bet. Compost tea works very well once a week only. A cup between the plants.Fish emulsion is a great feed. I use it all the time. In particular when I transplant. One cap full per gallon of water. When I plant bedding plants, I dig the hole, pour the fish emulsion mixture in the hole about half full. then put the plant in and fill the hole with dirt. Pour more emulsion mixture on top to get rid of the air in the ground. If you are using compost you probably will not have to add fertilizer. Compost is a simple form of fertilizer. One that gives your plants food all the time. More people kill with fertilizer and too much water. I have never used guano tho I know what it is. But how high are the nutrients. Too much nitrogen which guano has and you get lots of plant and no fruit. Stay with the compost you will be safe and I am sure you will be pleased. I got 300 pounds of tomatos last year from 31 plants.. I use compost mixture and fish emulsion only