Just getting started with this

Eat mainly healthy food in as close to natural state as possible, eat less calories than you burn (but eat a decent amount each day) move more and you wil weigh less and get fitter. It takes time so allow yourself some less healthy food that you love but in moderation or you will be very bored with your diet. Factor in/plan eating out or at family/friends houses and make sensible choices while you are there. Log everything on mfp and then you can see if you are eating a balanced diet.
I have dropped 27 lbs since August, can now run for 30 minutes thanks to the C25k program and feel a whole heap better. I have 1500 calories a day as suggested by mfp and my diet isn't perfect but it is better than it was almost 2 stones ago. About 10 -15 lbs still left and it will take a few more months, but that is ok. I plan to keep on running!
This is for the long haul, not a quick fix