Weight loss diet plans, menus, exercise, help?

I want to lose weight before school starts up again...I'm struggling with what to eat. I need to plan what to eat in order for me not to eat everything in my house! A diet menu would be great. I'm not sure if I should do an all fruit diet or one food group. Just, whatever is best...and as for exercise...I've just been running for 30 minutes every day. Is there more k should be doing ? Or something else? Help! Are there any tips?! I've researched many things and so far I haven't seen anything good?