The key to success is simplicity. Do these 5 steps each week to create a simple and easy meal plan & grocery list:
Survey what you already have. Review you fridge, freezer and pantry for foods that are nearing their expiration. Use them as the base for meals next week.
Select 3-5 meals. I know you are busy so let's be realistic and start by selecting 3-5 meals that you will prepare. Use the ingredients from step 1 to come up with these meals. If you need inspiration, search "Recipes with zucchini" and find new recipes to try.
Use this template. In the first column, write down what meals you will prepare which days. Then review the recipe and record the produce needed in the second column, dairy & refrigerated items needed in the third column, and so on.
Shop with ease. When you are at the store, simply look down column 1 while in the produce isle and gather all the veggies and fruits you need for each meal you selected for the week. Do the same in the dairy isle, meat isle, etc.
Stick with the plan. Make the meals you selected and enjoy! If you find you aren't doing it, determine what got in your way. Sometimes we simply over estimate the time we will realistically dedicate to meal preparation. I like recipes that are ready in 30 minutes or less personally.