having trouble finding things to eat. lunch is usually my best time but I feel like I'm not getting…

having trouble finding things to eat. lunch is usually my best time but I feel like I'm not getting enough nutrients. . I'm usually blah in the morning and evening. Saturday all I ate was a breakfast sandwich in the morning and 3 bread sticks that afternoon. . should I get some of those protein drinks or nutrient drinks like ensure? any suggestions?