For example, your question on how to claim land was closed as "Unclear". I had originally flagged the question1, as without an actual question in the body, I was not entirely sure what you were asking. In context of the provided answers, this is a good candidate for "should be edited", and I have done so and voted to reopen.
In this context, my advice would be to never assume a question is obvious, without actually asking it. While it might seem obvious, other questions might seem near-enough for us to be unsure if that is what you actually meant. It is also worth addressing that without a question mark (?), your making a statement; you are not technically asking a question. I believe this may have also thrown me off, at first.
These questions are more likely to be suitable candidates for deletion. However, sometimes it is the exact wording you use that might close your question. Check meta for anything related to the close reason, and check the comments for meta links. Many users comment with meta explaining their reasoning, to help the user better understand why the question might be off-topic, and how to fix it.
Low-quality posts might meet suitable criteria for deletion, too.
Note that this is completely at your own discretion, but you may wish to delete poorly-received questions that are not candidates for being closed.
In almost every situation, you should have a look at the quality of your question, and address the down-votes with an edit, instead. Remember that spelling, punctuation and grammar are essential, as some users will down-vote, instead of suggesting an edit.
Sometimes, you post a question, and suddenly it has several down-votes, and no comments. The question receives little attention, and your not entirely sure what you can do to fix it. You can always ask here, in meta, but sometimes it just comes down to a conflict of opinion between you and the majority of voters. Remember that there is nothing wrong with conceding, in these situations. You will even earn a badge for it:
Peer-pressure: Delete own post with score of -3 or lower.
Also consider that once a question has a score of -3 or less, it will not appear to newer users.
1 I can not recall the context in which I voted on this question, but only that it has tags that I have had on my ignored list for some time. As such, I believe this was initially brought up in a review queue, whether for "low quality" or for an earlier close vote that was since revoked.