Others have already mentioned this, but it's so important that it can't hurt to repeat it: You provide a lot of value if you keep asking good questions. There's the obvious benefit of initiating the creation of questions/answers that will be helpful to others in the future.
There's another aspect: Well written and interesting questions provide enjoyment to those of us who come here to answer questions. Frankly, a lot of the questions I see are not well written, often have limited general usefulness, and are not very challenging. I sometimes still answer them partly because I want to help people, and also because I don't find enough great questions in the domains where I have the most knowledge. The more high quality questions are posted, the more it will attract people who enjoy answering great questions, which in turn makes the site better for everybody. I honestly don't know if I'll keep up my pace (I average about 3 answers a day) in the long run, and the main reason for my skepticism is the lack of good questions.
Just to be clear: When I talk about "great questions", that doesn't always have to mean that they need to be technically very advanced. It's at least as important that they meet all the other criteria for good questions. They are clear and well written, have enough scope without being too broad, they show that you have put thought and effort into the question, they are not duplicates, etc.
Beyond maximizing the quality of your questions, there are other ways to make positive contributions:
- Upvote good questions and answers, and downvote bad ones.
- Flag questions and answers that don't meet the quality standards.
- Find and flag duplicates.
- Suggest edits. Of course there's the "minor edit" caveat, so your edits should be thorough and substantial.
- Once you mastered the skill of asking great questions, help others improve the quality of their questions by giving them constructive feedback and suggestions in comments.
- After you accumulated some rep points, you can start working on an increasing number of review queues.