I agree at 200% with trinity.
JJJ, if you want to do too many things at once, you miserably fail because you can't keep up on the long term.
The most important is "What small change can I make and keep up on the long term ?". According to my personal experience, small changes leads more often than not to the biggest success.
I think that before focusing on quantities and calories, focus more on "how do I feel while eating ?". If you eat because you are hungry, or because you feel like it (it's not absolutely the same), or because you're bored, or because you're sad etc etc...
If you focus on conscious eating more than you focus on calories and quantities, then you will stop dieting then turning back to your old patterns. The most important is finding a system which works on the long run. If you deprive yourself, it won't absolutely work on the long run and at first stress, back on your old pattern. Then, you put on all what you've lost, + some more pounds.
In France, the health agency published a report about dieting, overweight, obesity. In summarize, it says that the more you focus on calories and quantities, the more you are prone to yoyo (lose, then put on back + a few pounds more). Which leads to metabolic issues even more severe than they were, so much more damage than the initial problem, the more you become more obese.
About workout, find something you can easily fit in your schedule. You can go to the post office by foot and it takes 10 minutes ? Be it.
Don't reason in "everything or nothing" pattern.
Better 10 minutes during a without or so-so day than nothing.
Again, small changes you keep.
For example, you can focus on "I take ten minutes to eat my salad and discover all the subtle tastes of this salad". Or "I chew every bite of biscuit slowly". It is a much more realistic approach than calories or quantities, and it leads to less deprivation, so less feeling a failure, so less emotional eating and such. The more consciously you eat, the least you risk to overeat.
Another example with exercise is, for example, "I go home climbing the stairs rather than taking the lift".
After you mastered the small goal you implemented and you can keep it for a few weeks, even months, you can add another tiny and very measurable goal.
Baby steps and conscious eating are the key to go on the long run.