Woodworking is a great way to relieve stress and accomplish something you can be proud of. In this world of "want it yesterday" woodworking gives you a break from the everyday hustle and bustle. If you hone your skill you might even make a couple dollars to boot. Just don't make the money part more important than enjoying woodworking. If you do it then becomes a job.
There are many different types of woodworking which all require a different set of skills. If you do one type of woodworking and find it's not your cup of tea move on to something you might like better. Woodworking skills are not something you are born with but must be learned and refined.
Making mistakes is just a part of learning. If you recognize the mistakes you make there is a very good chance you won't make the same mistake again. The best way to avoid making mistakes is to step back and look at what you are about to do. Sometimes there is a better way. If woodworkers could earn a dollar for every mistake they made we would have a lot of very rich woodworkers
Plan ahead. Planning is absolutely essential in all woodworking. If you don't have a plan your leaving yourself wide open for making mistakes. A plan can be as simple as a sketch you've made ahead of time or a professional drawing. Either way you really do need a plan if you want to be successful. Are there people who can take a piece of wood, a bunch of chisels and a mallet and make a work of art in an hour. Yes there are but only one in a million. Even Michelangelo had a plan.
When first beginning in woodworking choosing the right project is important. It's probably not a good idea to try and duplicate an 18th century Queen Anne highboy as your first project as this more than likely will end in disaster. People who do this quite often get frustrated and give up woodworking altogether. Something in the line of a birdhouse or a picture frame are excellent beginner projects. As your skills get better you can and will want to do more challenging projects.
The most important aspect of woodworking is to do things safely. Be sure and use all the appropriate safety gear. Read all the operating instructions that came with your power tools and do not remove guards on miter saws. This is by far the easiest way to be injured. And while doing any woodworking procedure that makes you feel uneasy just stop. There is probably a safer way.