Even if you do keto, I still recommend counting calories for at least a month to get a baseline. Use the LoseIt app or something similar. You have to know your normal daily caloric intake to get a good grasp on which meals and foods are problematic for your weight loss goals.
The biggest things to cut out are soda and alcohol. Then it's paring down snacks throughout the day. Also, be VERY conscious of what you order at restaurants or fast food if you eat it. It's difficult to find much under 1,000 calories on sit-down restaurant menus and most fast food combos end up around that with fries or a side.
I eat at about a 300-400 calorie deficit most days and I track everything I eat or drink. Once you get in the habit it's hard to eat at restaurants because everything is loaded with calories. Even mindlessly eating chips at a Mexican restaurant can tack on 400 calories without even denting your appetite. It sucks to get to dinner and see you have like 200 calories left because you snacked a bunch or had a huge lunch.