Maintaining a healthy lifestyle and keeping up an exercise schedule is all about forming a habit. If you are a smoker, I sincerely hope you are aware of the health risks (and expense!!) and are working on cutting down, if you tend to have a few beers or a bottle of wine most evenings, then hopefully you're not doing this because you think it's good for you. Cutting down an unhealthy habit is never easy, but when you have a new, healthy habit to replace it then forgoing the old ways can become a lot more manageable.
Adding exercise into your daily routine as a habit will give you something else to focus on, hopefully making you more aware of how those unhealthy habits are having an effect on your body, and as they begin to take up less of your time, how your healthy habits become so much easier and enjoyable. Exercise in this way should never be seen as something to be dreaded or as a punishment - exercise is a reward for your body, your body which is designed to move. Whether it be just walking or cycling to and from work, taking up an exercise class or activity with friends or even walking around a park by yourself - by taking the time to form this habit your body will pay you back by feeling less tired, having fewer aches and pains, and by feeling stronger.
When it comes to healthy eating, it doesn't have to be complicated (in fact, the simpler the better). Now is not the time to be thinking outside the box - basing all meals around fresh vegetables that are so easy to cook and vary, while thinking about what nutritional benefit is coming from each meal you have will go a long way to getting onto the right path. Personally, I am a big fan of Jamie Oliver, and his '15 Minute Meals' was instrumental in showing me how a simple yet nutritious and great tasting meal can be put together so quickly. Let your microwave gather dust, pull out your pots and pans and find out just how simple it can be.