I'm treating the money and job ones first, after that I'll tackle my weight (I did manage to lose 40 pounds a few years ago, but got them back compensating for the shitty job and money troubles).
Calorie & weight awareness. It's really the simple guaranteed key to keeping weight off and losing it. More than exercise, more than ketogenic diets and a billion bits of contradictory information, being aware of how many calories you eat is really the key to not being overweight.
You can lose weight even with really busy schedules under $10/day with a combination of liquid egg whites with salsa, carrot stick snacks and subway/chipolte for example. Just eat at the -1.5lbs/week calorie level to lose weight with a calorie calculator[1]. Remember to recalculate every 5lbs or so of weight loss.
Also record your weight at least weekly with something like myfitnesspal or a wifi weight scale (like the fitbit aria) to snip weight gain trends in the bud. I once gained 30 lbs over a period of 5 months without realizing it due to not tracking my weight, stress and my exGF getting into baking. %70 of americans are overweight, your not alone.
I'll second what mahyarm said about being aware of calories.
Download Myfitnesspal (or bookmark the website) and use it for one week.
I'll disagree with mahyarm about needing anything fancly like liquid egg whites. For most people substituting water for softdrinks will make a substantial difference to the calories. Carrot sticks do make a good snack though (they have a high satability index). Pears are also good if you prefer something sweeter.
