Running is a great way to get in shape, but for a lot of people it can ultimately create some problems -- because they are not running properly. When you're starting out you need get your posture and technique right, even if you are just doing a simple jog around the yard. I know that sounds pedantic, but just a little learning and preparation can greatly reduce the chance of injuring yourself or even worse suffering from permanent long term conditions that leave you less mobile than before.
The first tip that every runner should use is to stretch properly. This is going to help ensure that you avoid any type of nasty muscle injuries, but also help to get the muscles loosened up which will make your run a lot easier than what you may be used to. Without this, people could struggle to get the run in like they want to have because of cramps or other muscle problems.
Letting people know where you are planning to run is another useful thing that people should be doing. While a run may seem like it is a very easy thing to do, people need to realize that emergencies do happen, even to experienced athletes. It's great to run in the wilderness but heart attack and other medical emergencies do happen. If anything happens, you may not be able to call someone and may need to have someone come and find you. So if running out in the nature somewhere, do let someone know your routes and roughly when you expect to be back.
Finally, it's important to understand your limits, particularly to start with. People often overestimate how far or for how long they can run. If you haven't exercised in a while, your health may not be quite what you think as our bodies quite quickly adapt to the lifestyle we assume. Start with a very short 5 or 10 minute loop and see how you feel, then progressively build up. It's also important NOT to run every day.
As many people have quickly found out, running is a great way to get into shape. Just take it slow to make the most of it, and if you are in any doubt at all, consult with a medical professional before starting out just to be on the safe side. You want your new running adventure to be enjoyable so just a little planning before you head out onto the track or the trail will pay dividends.