There are dozens if not thousands of ways to present…
…your imagery. None of them separates the man from the boy more than an actual print.
To take it to the next or better said professional level you really don’t want the usual press print that you get by the most of the well known cheapo print services on-line. The problem here is that all images are getting printed with the same settings without monitoring by a human being.
In fact I always have such prints at hand just to demonstrate clients how bad they are compared to the real deal.