Hi and welcome to you all. I would just say that make sure wherever possible to not have any temptations in the house i.e loads of bars of cholate, bags of crisps etc. You should always have plenty of fruit laying about as its the easiest thing to grab when you feel peckish also muller light yogurts are a good go to.
As for meals i have found a whole new world has opened up by using spices in my food so i would say every week when you go shopping just keep buying a couple and you will soon build up a good collection that will last you ages some that i use are cumin, coriander, ginger, cinnamon, tikka, tandori, mild curry, hot curry, paprika, smokey paprika, cayanne pepper, thyme, oregano, parsley, garamasala, chilli flakes i also have most of the swartz range. You can loads cheap at Aldi, B&M bargains, Home bargains and i get alot from Morrisons to. Other things to have are tobasco sauce, light soy sauce (great on salmon) worcestershire sauce and stock cubes.
I would also suggest making meals in bulk. I make chilli con carnes, curries, home made burgers in advance. Chilli con carne i make a massive batch that makes 5 meals worth in one go so you can freeze some or always leave one in the fridge if you feel hungry just zap it in the microwave for 5 minutes.