The most efficient method I have found is meal prepping. The way I meal prep is simple: Greens, a base and protein. For greens, I cycle between romaine lettuce, spinach, butter lettuce, kale and arugula. For the base, I shuffle through brown rice, white rice, sweep potatoes, noodles, pasta or bread. Proteins include either chicken, beef, fish or beans (black, pinto, garbanzo) cooked. I then add salt, spices, seasoning, and put marinara and salad sauce in tiny portable sauce jars. I take out my 6 same size plastic containers, and split up the greens, base and protein amongst them.
This is 3 days worth of food, so I just mix and match what I want for lunch and dinner for the next 3 days and keep everything the same. I assign 2 sauces for each container, and put a fruit on top of it as well (I love blueberries, strawberries, raspberries and back berries) and leave bananas, apples, pears, kiwis, avocados and nuts on my table so I eat them as snacks. I also have cliff bars and chamomile, green teas. I try not to keep any sweets or sugary drinks in the house, and I'm forced to eat fruit when I want a snack.
I got a lot of inspiration from this video, and had incredible results adding in my own recipes. Click 'home' in a new tab, and find the meal prep YouTube video on the home page. Try out meal prep for 3 days and see how it goes! :)