Try to as a rule cover at least half your plate with vegetables. By doing this you will get closer to the longevity style diet that is comprised of 80% plant-based foods. By stopping quickly to look at your plate and noting if at least half is comprised of vegetables or fruits, you give yourself an easy check as to if your diet is on track. This mental cue will help you to make better choices as you go through your day. Try your best to look for the vegetable options in a restaurant or to buy vegetables to plate at home. This will give you the best chance at a diet that will promote your longevity.