Welcome! We're glad to have you here! So many of the questions you ask, we all struggle with on a daily basis. I'll give the answers as I see them, but as this varies for each person, someone else may have answers that better fit your circumstance.
Healthy eating = clean eating. It's actually a fairly simply idea, but can be tough to follow through. You want to eat foods as close to their natural state as possible. Fresh fruits, vegetables, nuts, whole grains, beans, and lean meats. Try to avoid processed foods - become a label reader - and be diligent about that. I am also an 90/10 follower, meaning that I eat clean 90% of the time. Sometimes the urge to have those potato chips is simply overwhelming. So, I give in occasionally, but I try very hard to keep the portion within a single serving.
Motivation is tougher in that we each have different things that get us going. For me it's that I need a challenge. If I have a goal and a structured plan for obtaining that goal, I do much better. Logging on to the boards helps as well. If I'm feeling wishy-washy about exercising, I log on and read what everyone else is doing, and feel that I really should be out there working out. And when you start to see/feel results (100 pounds takes a while, so you won't see results right away, but you should start to feel them) that motivates you like nothing else. Also - find something you like to do. There are so many fitness programs out there, and so many choices that if you are not motivated by one, try another.
You'll get tons of responses - I hope we help you further your quest for fitness - good luck and keep in touch!
