I eat real food. Meats, seafood, vegetables, healthy oils and fats, fruits, organic whole fat dairy, and nuts. What I don't eat? Generally, I avoid refined sugar, grains (including wheat, rice, barley, oats, corn, etc.), fruit juices, reduced- or lowfat dairy, processed foods, MSG, hydrogenated oils, preservatives, or anything else that can't be pronounced. On rare occasions I spring for carefully prepared organic non-gluten grains like plain white rice (a safe starch) cooked in bone broth.
My approach is that every day is a chance to try new tastes, and to do a little bit better in terms of eating for health and vitality. My husband is easy-going about this lifestyle; he happily eats whatever is prepared for him, so as a result he is mostly primal by default - though he occasionally buys a sandwich at work. (I'm working on him. ;-) )
I am also working on increasing our activity levels in a context of play - while pushing myself in intense workouts and other new fitness ventures.
My main entry into the primal/paleo world came via the blog of Mark Sisson - Mark's Daily Apple. Fantastic daily content on healthy eating, fitness, natural lifestyle choices, and generally improving your health and quality of life! Check out his blog post The Definitive Guide to the Primal Blueprint as a starting point for understanding his approach to the primal life.
For more ideas, recipes, and approaches, check out my blog roll in the right hand column.