I'm new here, but I am already addicted to reading and answering questions. I am predominantly on my phone.
How can I beef up my posts?
I recently learned about using > at the start of a line to create the yellow-box blockquote effect. Are there any other simple tips and tricks to help make my posts look that much more professional?
It sounds like you should look at the help pages about using markdown syntax and general formatting guidance - these pages will explain and provide examples of the formatting syntax used on stack exchange.
You can also look at this excellent answer by SSD, which, although not an official style guide (as we don't enforce any specific styling), is nevertheless a good set of conventions to keep in mind when formatting questions and answers.
In addition to the help pages linked by Carcer, if you find any piece of formatting you like the look of (and want to understand how has been done) you can click the edit button beneath the post to view the specific markdown (be sure not to submit an edit if you only mean to look at its source code).
We also have a few posts on meta regarding formatting:
Is there a functional purpose to putting things in code text here?
And the rest of the questions tagged with formatting on meta.
(And if you do get into equations etc., you may have use of math.se's tutorial on MathJax)
As a final note, you can always jump into chat if have a quick question about how do a piece of formatting, about the site, or just to, well.. chat.
