What are some websites with weight loss and nutrition guides?

Hi! I'm trying to lose 20 lbs by December to get to 145. i dont know where to start though. i park in one of the farthest spots in the parking lot when i drive, take the stairs at school and the mall and everywhere, and i try to eat mostly fruit and water and am starting to eat salads. Please give me some sites where i can find everything i need Thanks everyone!