PROTEIN AND FIBER!!! 
They fill you up! I am on 1200-1300 and I am genuinely satisfied when I get 80-90 grams of protein, 20+ grams of fiber, and keep carbs under 150 g a day. Use Daily Plate, My Fitness Pal, etc to track these nutrients easily.
Cut back on carbs! For me, they make me feel hungrier and less satisfied. A bowl of cereal leaves me begging for another one; two eggs + an egg white (roughly the same calories as the cereal + milk) leaves me satisfied.
Try to make sure about 80% of your food comes from nutrient-dense sources (pomegranates, steak, fish, eggs, kale, as opposed to white rice or desserts). This is a really rough estimate I made up, so don't take it as proven nutritional advice

But I do find when I eat really nutrient-rich food I am more satisfied for longer. Michael Pollan suggests one of the reasons for obesity in this country is that we eat nutrient-poor food (processed, fast food, etc) and our bodies beg us to eat more- because even if it's getting the calories it needs it sends signals caling for more nutrients. Just a theory but one that really makes sense to me.
And just a random note- the MOST FULL I can be on the fewest calories is: 3/4 c oatmeal + 1 scoop protein powder + 1 tbs peanut butter. Holy cow. It has something like 40+ g protein, some good fats and complex carbs, and lots of fiber for around 400 calories. When I am hungry or munchy or just can't seem to kick the snacking, this is my "go-to" meal. It is sweet and peanut butter-chocolatey, but keeps me from eating anything else for quite some time.