As a rule of thumb i know that i should be eating fruit and vegetables every day. I try not to think about it daily (i.e. 5 portions a day) , but rather over a week (that on most days I have eaten fruit and veg) so there might be a day when I (and my daughter) eat about 3 portions, but will eat significantly more on another day.
I do make soups once or twice a week which are all vegetables and I feel add a punch to our overall diets. My daughter is addicted to tomatoe soup so she has this at least once a week, and another soup like butternut which i make for her.
I take fruit with me to work to munch on as when i am hungry I can reach for these.
I also buy weekly lots of fruit and vegetables that I am intersted in and plan my cooking around these. I try and have at least 2 days a week when we only eat vegetarian meals as it makes me more adventurous in making salads and coming up with ideas, instead of just cooking sausages for example and adding a vegetable to this.
I use red peppers and carrots etc as dips for houmous etc - and often cut up vegetables and put them on the table for munching and dipping on.
I always offer my daughter fruit, and put together bowls of berries, chopped fruit etc. I try and vary our diet to try what is seasonal, and try it in different ways.
If we are travelling, or out and about i take with me smoothies; fruit juices bananas and other fruits that atravel well etc which add to our overall intake.
I often add berries; chopped bananas to porridge
I also use dried fruit, raisons, apricots, prunes etc.