Need Diet Help

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Before I post my diet I'd like to say, I know its my biggest weakness. I need help and thats why I'm posting. Give me some guidance!

Stats: 5'11 190lbs.


Meal 1 - Post cardio - 7am
Whey shake & daily vitamins
sometimes a banana

Meal 2 - Breakfast - 9:30ish am
Meal replacement shake (slimfast usually - flame away, I like them )
NutriGrain bar or granola bar
Yogurt

Meal 3 - Lunch - 12pm
Chicken usually 6ounces or so
fruit or granola bar

Meal 4 - 3pm
Tuna 3 ounces (I know I should be eating more)
yogurt
nutri grain bar or granola

Meal 5 - PWO
Whey shake
piece of wheat/grain bread

Meal 6 - 6/7pm
Usually varies a good bit but I try to keep it healthy.
lean meats

Also eat probably 3 ounces of almonds throughout the day.

I know it needs ALOT of work. I'm just looking for some tips specific to my diet. Not what you would consider all out bodybuilder but derfinitely trying to get bigger. Any advice is greatly appreciated.