I have a pot of herbs; parsley, coriander, thyme and basil and a separate pot of wheat grass. The thyme, basil and parsley I use more for cooking although they are included in the girls diet (not daily), on the otherhand, I dont use coriander much for cooking however it is part of their (guinea pigs) daily diet.
I used a pot, filled with a layer of gravel and a good quality soil over the top for the herbs. I dug little holes using my fingers, placed the herbs into the holes and added some more soil, I finished off by thoroughly watering everything down.
Wheat grass is probably the easiest and the most quickest to grow. I got a packet of seeds for free from the exotic vet I see. Again, I use a pot, with a layer of gravel and a good quality soil over the top. I evenly spread the seeds across the soil, added a thin layer of soil (so that it covers the seeds) and watered everything down.
Both pots are placed so that they get natural light.