Many venues should not mean many journals. Journals are only one possible venue for your work and by limiting yourself to them you limit the potential reach of your work. Other scientific outlets are conferences/congresses, presentations to universities and societies, scientific blogs and magazines. If you are planning on publishing your work then one potential route would be to present it at a conference, either as a poster or an oral presentation, before writing it up for a journal article. Once the work has been presented at a conference it can become part of a talk to give at other universities or societies, and this talk once it has been given several times could be written up either as a review of the work of your lab for submission to a journal or magazine, or published on a blog.
By presenting the work in these different ways, a number of different audiences can be reached and introduced to your work. They can also be excellent as opportunities to network and grow your circle of associates, possibly helping to bring about collaborations and secure funding. I would therefore suggest that if you are early in your career you should be trying to get your work seen and heard of. You might not be able to be invited to present your work to another university or interested group. However, you should be submitting your work, once it has reached sufficient quantity and quality, to congresses, or offering to talk about your work to undergraduates or other research groups you know. These might also have the added benefit of providing new thoughts and ideas on your work from people with fresh perspectives, as well as identifying any holes that need to be looked into.
Another way to be able to talk about your research with more people is to volunteer for societies and attend local interest group meetings. This may bring you into contact with influential people you will not meet in any other way.
Having told you not necessarily to publish everything in a traditional manner, I would recommend that you start trying to write regularly. This could be typing up experimental methods and results so that they are ready as soon as the decision to publish is made, putting together review articles or free-writing around a research idea.
This writing will hopefully improve your productivity, as well as helping to organize your thoughts and create new ideas, as well as potentially helping you overcome any stalling points in your research. It might be that you are trying to develop a total synthesis and you are stuck on a single step, by searching the literature and making notes on what others attempting similar transformations have done. This is likely something you are already doing, but by keeping written notes you will be have something that could potentially be the basis of a review article and you may notice connections that you wouldn’t spot if you just read and highlighted articles.
Finally, practice makes perfect and by writing more your communication skills should improve.
This probably sounds obvious, and it should be. Nowadays, scientists and researchers are judged, rightly or wrongly, by their publication history. This has contributed to the explosion in the amount of scientific literature available and if you browse it you will often see work that makes you wonder why it was published and what it adds. The obvious answer to this is that it adds to someone’s publication list and that is the only reason it was written up and submitted to a journal. Do you want to be one of the people who add to this pile of ‘irrelevant’ literature? I would hazard a guess that you do not want this. Therefore, this first piece of advice must be given with a proviso that you should write regularly, but only publish relevant work. This might necessitate a change in the way you think about publishing, for example if you have a series of experiments that confirm somebody else’s work that you have done as the groundwork for a research stream, you may want to publish them on your own website if there have been other people also publishing on this. This means that you will not be diluting your work and you will be known for your strong publications.