What is it that the people of your niche need and want to learn? If you can figure that out and be the one to teach them what they want to know, you can write some great content, see increased traffic, and built trust and respect from those in your niche.
Writing how-to articles is pretty easy and even fun. Think of it as writing step-by-steps. Go through the steps from the start to the finish. Try to put your own spin on things. If you can set your steps or how-to apart from others, people will want to read everything you come out with.
If it makes sense in your article, be sure to include images and/or screen shots showing what steps you are taking to come up with the end result. Show and tell is always a great thing to do, and it will make it easier in the future if you decide you want to convert your article into a video demonstration.