Good to see people going for this. For me, I cook for the family (wife, 6yo and 1yo), and it's always a pain trying to compromise between taste, what can be set aside for wife's work lunch, and what the kids will eat. So I try to sort myself out during the day.
For lunch I'll have a piece of steak, fish or chicken, and with it two cups of frozen mixed vegies - that's 4 serves of vegies. As a male I'm supposed to get 6 but it's 2/3 of the way there, at least, so long as we have vegies at dinner I should be fine - and dinner is often a pasta sauce with diced tomato as its base, or a curry with vegies in it, so another 1 cup of vegies should get into me somehow.
As for the fruit, for five days a week at 4pm I'm into the garage (gym business), I take two pieces then as an afternoon snack, and to keep me going until dinner at 6pm.
With that approach, on 5 days a week I hit the targets, and 5/7 is 72% which is a pass mark, right? Usually the fruit is an easier target for me to hit than the vegies, even on the non-garage days because I don't have to be creative with recipes.
Once I hit my 40s my digestion slowed down, I'd get reflux from time to time. Focusing on the fruit and vegies seems to make things flow through better, so to speak.