As you decide what to plant, keep in mind that some plants grow best in the company of other plants because of complimentary growing behaviors. For example, one may deplete some nutrients from the soil while others may replenish it. Similarly, planting certain flowers next to crops may attract predators away from your produce. Planting such species alongside each other is a technique called “companion planting”. As you decide what to plant, you may want to consult companion planting guides:
Organic Gardening Magazine: Companion plants
Organic Gardening Magazine: Plants that lure beneficial insects
Something else to consider is the maturation time for each plant. Would you prefer to start from seeds or seedlings? If you are going to start from seeds, you should order them now.
Next, see:
Starting from seedlings Starting from seeds