If you are working in an office that has a lot of old drawings around, take the time to study them in detail. Note the small things that make one drawing give a better first impression than another drawing. Things like proper lineweights, organization, clarity, neatness. None of that has anything to do with the content, but it gives the observer an immediate impression that the drawing's author knew what he was doing. Take the same care with anything else of a visual nature that your produce. Take that little extra time just to make it look nice. Make it pop. To be blunt, do something that frankly this new generation is not known for - take personal pride in your work.
While we're at it, you can also make sure you don't fall prey to another ALL TOO COMMON habit of the younger generation. They seem to think that all written communication is the same as texting. Many of them pay no attention at all to grammar, spelling, punctuation, paragraphs, syntax, etc. How did these folks ever get a degree? That tells me a lot about our schools.
I have numerous examples in my inbox. A graduate engineer recently sent me a request for information. His message was three sentences. It had one capitalized letter, five misspelled words, and one period. This young man is a competent engineer, but you would never know it by his communication. He is hobbling his own progress.
Oh, and one last thing - the fact that you are asking the question is very a good indication!