Your meta question was an example of low quality.
Your keyboard is blessed with a key labeled as "Shift". Use it, please.
In English, you should capitalize:
- The beginning of a sentence
- The personal pronoun "I"
Of course, Stack Exchange sites are not an English class you have to take, but think about your readers. Proper capitalization will ensure that your posts are easy to read – plus, you won't come off as lazy.
Here's an example from Feb 4thexample from Feb 4th:
- Capitalize "I" and the beginning of sentences
- Don't use "Problem" in titles, it's not a valid description of an issue
- Add paragraphs to your walls of text so they're easier to parse