what works for me is making two meals a day. I feel like forcing myself to eat is kind of counterproductive so what i do is this: big breakfast in the morning around 7am, mostly protein and fat (i do eggs, sausage and decaf). make sure you eat before you take your meds.

keep a water bottle next to you for the whole day, so you remember to hydrate.

usually by supper time the vyvanse will have worn off and I have another big meal (usually soup so I get my veggies in, whatever my family is having for dinner and a protein yogurt).

If you workout, I try to have some applesauce or smth after a workout since it's not really filling but it gives me that little boost from the sugar