The thing about weight loss is that there's a lot of subjective factors; some people find it easy, some don't. Some can survive on the same thing day after day, some can't. Some like to exercise, some don't.
For me, I've lost weight and kept it off by following a few rules:
1) Don't drink calories
2) Drink more water. I use "Mio" to add flavour to it, because it helps me drink more water. Also diet root beer in the SodaStream works for me, too.
3) Don't starve yourself, you'll go overboard later (for me, at least). Have healthy snacks available. On the go? Grocery stores usually have a carrot/celery container, just get some protein to go with it. I've gotten turkey kolbasa, for example, and it's high in nitrates/salt but low in fat. Salt isn't an issue for me, but YMMV
4) No eating after dinner
5) Microwave popcorn and water is pretty healthy (get the low fat/salt ones) for a snack
6) Dinner should fit on a small plate if possible. Whether it does, or doesn't; no seconds
7) It really does take time for your brain to feel full, so slow down when you're eating. If you eat and you're still hungry, wait for at least 15 minutes and reassess
8) Exercise. You don't need to run marathons, just move. Walking, running, elliptical, bike, row, whatever. Do something.
9) To get started, use a calorie tracking app. I used LoseIt! but they're all basically the same IMHO. It keeps you accountable and even more importantly, it tells you how many calories are actually in the food in front of you. I was surprised when I started as I estimated that my dinner had maybe 500 calories and it was often closer to 700! It makes you realize what portions should look like. Once you get the hang of it, you can ditch the app or keep it if you like seeing a daily calorie deficit.
This worked for me. You're not me, so it might not work for you. There's no one single tip or trick or hack; it's consistent effort every day for weeks and months. There's no shortcut, it takes a long time. You didn't gain weight in 3 days, you can't lose it in a week.