Try and get at least one in at breakfast - avocado on toast, some grilled mushrooms, some baked beans. Add some fruit and yoghurt and you're two down already.
Roast a big batch of veg at the weekend and have it at lunch.
Swap your favourite meals for veg versions eg veggie lasagne, or bolognese over courgetti. Add extra veg to pies, or pasta sauces. Add some veg to meat skewers and BBQ. Take leftovers for lunch to get an extra serve.
Make soup - easy to get lots of veg in there. Even a little bowl before your evening meal will up the amount of veg you're eating.
Add veg to eggs. Omelettes, fritattas and quiches all carry extra veg well.
Make some veggie muffins to snack on.
Try to add one bit of veg to the food you would normally eat. So some sweetcorn in a tuna sandwich, or spread your ham and cheese roll with avocado first. Grate carrot and courgette into sauces. Add some frozen peas to pasta. Mushrooms and peppers in chilli - not authentic but it doesn't matter.
Would cooking things help? I'm not a fan of raw tomatoes but I like them slow roasted. And griddled gem lettuce is delicious with ranch dressing.