Wireframing is a skill, not just a technique. As a practice, it has more in common with sketching than prototyping. From the very beginning you are starting to make design decisions and getting the feeling on how it will work before committing time to building anything.
It's an opportunity to take all the ideas you want to include and see how all the pieces fit together. In this case, quantity matters as much as quality, the more ideas and variations you put down, the more you will have to choose from. You can get messy, add, subtract, refine but try not to dive too deep too quick. Sometimes we judge our ideas before giving them the opportunity to lay them out and see how they develop with other elements so here is where you can add, add and subtract later. A really helpful way is not to think conventionally and the result can even surprise you.
The real fun begins when the client gets involved. Showing your wireframes allows you to validate and improve your ideas. It can help them make very important decisions about the information structure, instead of getting caught up in fonts or colors distracting them. So it will save you a lot of time spending on design software, having your client ask you to change a header to the left and a column to the right. This won’t be a problem when working with wireframes, allowing your client’s feedback and ideas incorporate real fast, and also saving them a lot of money.

Get started, prepare your tools, warm up drawing a few lines and simple icons. Start drawing a few apps whenever you have some free time, practice drawing basic building blocks of your designs. Bring tools wherever you go, buy a folder just to keep them safe. I always carry a notepad, few post-its and markers.This helps you ensure to capture your idea on paper at any time, otherwise you may lose the thought or not be able to remember it as detailed.
In time you will be able to find out what suits you the best, sequence, platforms, and steps to fulfill your creative potential. You will get there if you're constantly trying new things and experimenting with different formats and styles.
If you are able to draw a line, a circle, a point and a square, then you have the basics to sketch any project you are getting started, so lets experiment!
If you have any sketching tips for fellow designers, feel free to share them in the comment section.