Issues with writing in LaTeX often stem from incorrect syntax, particularly with the use of tags. Users are advised to ensure that the closing tag uses a forward slash instead of a backslash, and to avoid spaces within the tags. For example, the correct format should be [tex] a=\frac{m1*g*sin\theta}{cos\theta} [/tex]. Additionally, users can experiment with LaTeX commands to see how they render, such as using various Greek letters and mathematical symbols. Proper formatting is essential for LaTeX to display equations correctly, and small errors can lead to significant display issues.