Exercising every day. Most days I do yoga in the morning, yard work at some point and do either HIIT-- high-intensity interval training, hike, walk or take a bike ride. The variety keeps me motivated, works different muscle groups, and the discipline of tracking the time I spend keeps me on target for meeting my goals. I also lift weights.
I track what I eat and drink and my weight in the same notebook.
Congrats on your weight loss so far! Persistence is key. Bear in mind that the less you weigh, the fewer calories you burn because it requires less energy to move less weight. Increasing the duration or intensity of your workouts will help you avoid a plateau now that you're near your goal weight.