Dinner Suggestions??

Now that we are on a budget, I cook every weeknight (unless we have dinner plans).  But if I'm going to be cooking all the time, I really need to get some new recipes! We eat the same thing over and over. When my husband and I first got married (almost two years ago), I used to pull out my cookbooks and try new recipes. But I've gotten lazy...so most nights we either have:

Spaghetti and Meatballs (my husband's favorite)

Chicken Parmesan (so easy and yummy)

Salmon

Hamburgers

Any suggestions on other dishes I can make, or do you have a favorite cookbook that I should try??