There is a lot of great advice here, but to add a few more things to their lists:
Stretching - You might think that you really do not need it just starting out but it helps with the quality of life and you will get use to doing it. I use to do stretches every day when I woke up just to do them and start the day, it just makes things easier.
Forget the scale - A scale only shows pounds and does not show your work. Many people get frustrated when they work out because their weight will fluctuate, it is natural. Building muscle will help you burn more fat even when you are not working out, but it is heavier (per sq in) than fat so you might be losing fat but gaining muscle and the scale does not show a change. Best thing to just your progress is just how you feel and how your clothes fit.
| Body Fat %: 13.0