Most people do not know how to run. Seriously. If you cannot find a beginner running program somewhere in your area, at least look up some running tips for beginners, or even a running plan for beginners. In doing so, you are preparing yourself to treat your body better, and are then able to get the most out of the run.
Any running plan for beginners will first tell you to stretch and warm up. It may seem silly if you are just planning on a casual jog, but a lot can happen to your body and your muscles with even the slightest change in behavior and stress. Particularly if it is not accustomed to running prior to this. You want to work your neck, you shoulders and your back to start. But focus the warm up predominantly on the legs, the joints, and there are even stretches for your feet. Do not forget all of the different muscles in your legs. If you do forget one, you will know which one it was by the end of the run.
Start slow. Do not set unattainable goals for yourself. If you start with little milestones that are a push, but achievable, you will not get defeated and can feel a sense of achievement every time you go out. Do not set your sites too high, too quickly. When it comes to speed and distance, you need to work your way into it.
Hydrate, hydrate, hydrate. Even if it is your first run and your pace is a crawl, drink water. Even if it is 30 degrees outside, you are wearing three layers, and your teeth are still chattering, drink water. In this case it can be warm water. And if it is 90 degrees out, you are wearing barely anything, are sweating more than you thought humanly possible, but are not thirsty, ESPECIALLY drink water. Remember, just because you do not feel thirsty and are not sweating, does not mean your body does not need the water. It uses the water in your joints and muscles too.
They are really simple tips, but they work. The pros do not skip out on these, neither should the novice. Just remember, when you go for a run, you need to SWeaT. Stretch, drink Water, and take your Time.