Focus on increasing the amount of fruit and vegetables in your diet. As many as possible really. Eating them raw is good, or lightly steamed with a minimum of olive oil. You might look into joining a [organic] CSA, this makes it so you're dedicated to eating a big box of these every week. find a CSA

Watch out for refined wheat. If it doesn't say [100%] whole grain as the first ingredient, it's basically the same as white bread, and you may as well be eating sugar, it's very high-glycemic. The nutrients are stripped away then they have to add vitamins so it's not completely worthless, and they call this "enriched". Wheat also causes mucus buildup in the intestinal walls, impeding absorption and potentially causing more cravings for nutrients (unneeded calories). Lastly, wheat is actually addictive, its peptides have a slight opiate effect, similar to that in dairy (casomorphins). Quinoa and sweet potatoes are great cooked carbs to eat. I also eat a lot of bananas. Cheap and easy. Brown rice may be ok too.

No processed/packaged stuff at all if possible, and no fast food, incl all chains like Subway. Too many chemicals. Try and do all your shopping on the periphery of the grocery store.

It's expensive, but try to only buy organic meat and dairy if you must eat them. The chemicals, hormones, pesticides and antibiotics in non-organic are nasty and accumulate in the fat of animal products. They're actually estrogenic, causing us to accumulate stubborn fat around the gut and chest. Grass-fed meat and raw dairy are best.

Are you drinking much alcohol? Another huge source of extra calories, makes us crave more food, and is also estrogenic.

Do some weight training, nothing revs the metabolism like putting on muscle. I recommend high intensity interval training. Go all out for 20-30 minutes 3-5x per week, that's all you need. Plus cycling.

I've been getting down with this guy's stuff lately, he's a badass.