with Sue. Those tips would likely be good for those just starting out on their own, but for more experience and well read cooks, most know it already.
My only other tip for healthy eating would be to cut back on restaurants and fast food meals. They add up. You can eat more healthily at these places by making proper menu choices and speaking up to get rid of sauces and such.
Having friends/family over for dinner need not break the bank. Cook from scratch, don't order in. Find new recipes and experiment. Plan for left overs.
A whole chicken makes many meals. Even a deli chicken can be stretched to a few meals. That carcass is just as good for making soup or stock. What we do is legs and wings for one meal. Cut up the breast for sandwiches or hot sandwhices another meal. Pieces get frozen for stir fries and the rest for soup.