eat healthy, cut out most processed foods (if it comes in a packet don’t eat it unless it is health) excess salt, sugar. Snack on fruit (fresh and dried), veggies (carrot celery etc.) nuts (unsalted and raw are the Healthiest) and cheese, salad, yogurt during the day. Cut down on red meat (about 1-2 times a week) eat more white meat (fish, pork,chicken), Fresh veggies not that packaged frozen stuff it has no nutrients (the more variety of color the better). Instead of having 3 big meals a day (DONT SKIP BREAKFAST) try to have 4-5 smaller healthy meals a day (helps your metabolism) and try to avoid having a big dinner and try not to eat after 7pm (this prevents all your food from just sitting in your stomach when you sleep (you body doesn’t digest food when you sleep or so im told)). Eat more foods that are high in protein, fiber and a low glycemic index (google it if your not sure) as they will help you feel fuller for longer (thus cuts out any unnecessary snacking). Drink water not soft drink (soda) as it is has about 35gms of sugar per can (sometimes more), don’t be fooled by ‘diet’ soda it may not have any sugar but the artificial sweetener they put in it is just as bad for your body. If you drink coffee try to replace it with tea (don’t put sugar in your tea as your trying to cut out excess sugar, instead squeeze some fresh lemon into it (i woldnt put lemon in it if your putting milk in it may taste funny). Doing so will help your body absorbing 4 time more antioxidants). Cut out takeaway and fast food, excess alcohol. Fat in foods is not the enemy as most people think it is, altho excess fat is. excess carbohydrates are the enemy, your body coverts carbohydrates to energy (thus if you eat excess carbohydrates and dont use this energy in your body will store it as fat tissue). Im not saying dont eat that ice cream or Chocy biscuit, just and a small bowl or 2 bikkys instead of 5. The key to success is moderation.

Try to get in at least 30 minutes of exercise a day. If you walk do so at a fast pace this increase your heart rate (thus burning more fat), if you can run or jog do so but dont run everyday, your body needs time to recover. Some people prefer to cycle because its a lot easier on your knees, feet and ankles (whilst running it can put up to 3 times your body weight of pressure on your knees, feet and ankles (if you weigh 60kgs that would be 180kgs of pressure) that why people choose to cycle).
If your serious about loosing weight i would suggest buying a heart rate Monitor ($ 50-$ 100 for a basic one), you want your heart rate to sit at 130-145 Beats Per Minute whilst exercising. It will also tell you how many calories you have burned in that session. A more effective and faster way to loose weight is to do H.I.I.T. (high intensity interval training) this is where you get your heart rate up to about 130BPM and keep it at that for about 4 Min’s then sprint for 50-70 meters (this will raise your heart rate up to about 160 -180BPM maybe more) then slow down and let your heart rate BPM fall back to 135 hold it there for a few min’s then sprint again and so on (if you dont want to get a heart rate monitor wear a watch and jog for 4 Min’s run for 30sec run for 4 Min’s jog for 30 min and so on). The key to weight loss is you want to burn more energy than you take in (eat).
Remember these things take time so be PATIENT and KEEP MOTIVATED.

I know its a lot to take in at first, but following this will cut out excess calories and you will live healthier, have more energy and loose weight, It will be hard at first because your body will go into shock (you will feel like crap for a few days) as all the toxins leave your body. resist the sugar cravings they usually come mid afternoon or night, but if you cant have a pack of lollies in the cupboard and just eat one or two. this will get rid of the cravings without having to many calories.

Lift some weights.

start taking whey protein or a weight gainer. Or u eat 3-5 eggs daily.
eating banana will give u energy throughout the day.
drink glucose -d which is dextrose sugar gives instant energy after ur workout.
for gaining weight concentrate on ur carbs.