Difficult to maintain 1500/day (I get Hungry.)

I think it would help you if you'd plan your meals better. You should try and have something from breakfast even if it's not much and keep lunch and dinner moderate and around the same time every day.

Also and more importantly: eat a lot of low cal stuff with lots of fiber(helps you keep fuller for longer). Veggies like broccoli or radishes are great choices. Try and have smaller portion size at your main meals and add a salad with starchy veggies next to them .

I usually eat greek yoghurt or low fat cottage cheese right before bed, low in cal and tasty. I can't sleep well on an empty stomach. Hope this helps!

Sometimes I find it challenging to survive on 1200 calories per day (my daily total).

What helps me go to bed without feeling hungry are:

1) drink only or mostly water and save my calories for food
2) Eat lean proteins like chicken breast or baked salmon with a TON of veggies like broccoli, green beans or a salad without dressing for dinner. Adding brown rice to that helps too, if you'd like
3) lay off the sauces or condiments and save your calories for food
4) eating nutrient rich healthy foods vs greasy fast foods or high calorie processed foods so that your body has less food cravings because it's getting enough nutrients
5) eat desserts and sugary treats very sparingly so that you'll have more calories to eat at meals
6) make dinner your largest meal of the day
7) If I eat 1200 calories (my max for a day) and I still feel like I seriously need to eat something before bed or I'll suffer and can't sleep, I'll just eat around 100 calories of something like bananas, bread and butter, oatmeal, crackers and cheddar cheese, almonds and half a string cheese, muesli, some chicken breast, beans and rice, a boiled egg, plain baked sweet potato or some plain tuna.
8) I try to eat back half of the calories I burned during exercise (for example, if I burn off 200 calories while running today, I'll eat an extra 100 calories, so 1300 calories total for the day).
9) staying hydrated helps me. Sipping water a lot throughout the day works for me. I like to drink 6-8 (8oz) cups of water a day
10) patience. It took my body some time to adjust to eating less calories, but you do start to get a bit more used to it eventually

I hope that some of what helps me may also help you.

Good luck and welcome to MFP!