I hunt rabbits at first light. The best places to look for them is around a food source. Cotton tails like to graze fresh green shoots of grass and forbs. They also like berries and nuts. They will eat fallen fruit like figs and pears on the ground. Every gardener knows that cotton tails will mow a young garden flat. I have surprised cotton tails feeding in my compost heap. Rabbits prefer edge. They like to hang around hedgerows, overgrown fences, and treelines. Old overgrown buildings and farm equipment is another good place to look. Rabbits are as likely to be found along the edge of a pasture as along the edge of a planted field. Dense thickets provide cover during the daylight hours but a couple of good dogs will solve that. Good scouting for potential shooting locations is the key. When I Rabbit hunt my property I have about ten spots that I check in the course of hunting. If I don't see a Rabbit in any of the high probability spots, I sure won't see one any where else.
Mark, are you in high desert sagebrush or dense forest? That will give you two or more species that are possible to be hunted. Jackrabbits are a desert dweller and can be found on farmlands and sage brush by simply walking around and flushing them out or spotting them taking shade under sage. People dont typically eat these and theres no season or bag limit anywhere that I know of. Cottontail on the other hand are heavy cover quarry and do have seasons and bag limits so you will want to check your local regs. People do eat these and are good if done right. In my experience, they prefer thick brush (blackberrys, piles of brush etc) that are near clearings. They also can be found quite often in junkyard type scenarios(think places farmers keep old broken down equipment) Jackrabbits are much bigger, smarter and faster. Cottontail tend to be easier to get both because you are typically going to get much closer to them and they hold still longer. That's a general rule of thumb.