I like to print my drafts with big fonts and small margins (i do this in memoir style in a single chapter), but the
\include comand creates a page break. Is there a way to avoid this and have section after section continuously?
It seems that you have your sections in extra files. First of all this is not required by (La)TeX, you can have it all in one file if you want. (I imagine some people just get this taught from a template).
However, if you want to still use