Path to 20lbs weight loss

I still have about 20 lbs to go to make my comfortable weight.
Here's my plan.

1) Walk at work. I am moving offices, so this is going to make walking a bit easier, especially in the Spring. I have already blocked my work calendar during lunch time to do this. I have my clothes packed and ready to go.

2) Go back to my fish lunches and packing enough snack food for work. That includes yogurt, fruit, etc. That helped me the most when I lost the last 16lbs.

3) Stop the sugar/cookies. Sort of fallen off the wagon during the winter w/sugars. Will stop this immediately!

4) Eat smaller portions. I tend to be a healthy eater, but will overdo it on portions occassionally, so this is going to be sized down. For example, measuring the amount of pasta on my plate instead of just heaping it up.