I am writing on a larger text and sometimes I want to begin a new paragraph. So I don't want to have a new heading, just a space for visiual reasons. Currently I use the solution with \\ \newline
For example:
Here is my text text text and now I finish this thought.
\\ \newline
Here I begin with another aspect....
text text
Another solution I can imagine is with vspace, but this is also not really professional, so how should I do this?
As mentionned in the comments, you should not end paragraphs by \\ \newline, but rather leave an empty line between the paragraphs. Of course, as with many rules there may be an occasion where it is better not to respect it, but these cases are rare.
If you wish to have ALL of your paragraphs separated by more space, you can use \parskip = 10pt (or some other length) in the preamble. There are also some packages that can do this.
\parskip length; see tex.stackexchange.com/a/14565/510
– lockstep
Apr 29 '13 at 11:24
\\, but leaving an empty line between them. If you really want a vertical space between two paragraphs (but this is rarely necessary or useful), type\medskipafter the empty line and before the new paragraph. An empty line after\medskipis optional (but good). – egreg Apr 29 '13 at 10:50\usepackage[parfill]{parskip}. – Joseph Wright♦ Apr 29 '13 at 11:53\bigskip(but my advice is just doing a new paragraph). – egreg Apr 29 '13 at 11:53