I find the easiest (and best) way to go about losing weight is to try all kinds of different things and find a form of exercise you enjoy.
Yoga, martial arts, swimming - anything you can do regularly, and practice on your own for confidence, and most importantly keep to a timetable is best. If you keep a set day to do exercise on (minimum 2 days a week, ideally 3) you'll find it a lot easier to do the amount you want.
There are various advantages and disadvantages to each type of exercise though.
Weightlifting will burn huge amounts of calories, and can dramatically increase your strength. However, you need to allow a minimum of 48 hours recovery period between exercising a muscle group. That means that unles you have a very carefully planned exercise schedule thats split to different areas, you cant do it as and when you feel. In addition, you have to be very careful about getting a proper warmup before starting and stretching to cooldown afterwards, else you run the risk of doing serious damage to your body.
Yoga will improve strength slightly, and does wonders for flexibility. So long as you don't push yourself there's very little risk of injury, and is easy to practice whenevers convenient, at home from a DVD or in a group. The downside is that because its trendy, there are a lot of crap instructors and DVDs out there. If you decide to try it, you'll need a lot of patience finding the right style or the right instructor, and patience with the fact that progress is slow and gradual.
Martial arts are my favorite - once you've got the hang of it, you can practice basics (movement, strikes, patterns etc) on your own, and prettymuch any type of exercise supplements it. The downside is you *need* to have a good instructor, and unless you're careful, there is a fairly serious risk of injury. Like weightlifting you *need* a warmup and stretching cooldown, and like yoga you need patience - the increase in proprieception, strength, speed, reflexes and balance is a slow one. However, with patience you will reap huge amounts of benefits.
My personal weight control system is pretty simple. I practice TaeKwonDo under an instructor I hugely respect, and I throw in other stuff however I feel like. I occassionaly do yoga if I'm in the mood for it, weightlifting once a week at my own convenience, and I try out new styles once in a while. I've practiced Aikido, Taekwondo (first lesson was free
), Wing Chun Kung Fu (for free
) & Judo (for free
), and next week I'm trying out Wado-Ryu Karate (for free
). As you might have noticed, a *lot* of different martial arts groups offer free first lessons with no pressure or obligation.