Keep track of conferences (e.g. see the list at my homepage), and
journals on your topic and check once in a while whether some interesting
articles have been published in those.
As soon as you find an interesting article, also check the author's
homepage(s) for more recent results, and of course follow some of the references made in this paper.
Find people in your own university, or otherwise nearby who have more
expertise in this field than you have and ask (email?) them to recommend some
literature or conferences.
on reading a paper:
Add a paper to your BibTex database as soon as you find it (before you even print it).
If it is not there already, write the publication year on the print.
Make some notes immediately after you read it.
on writing a paper:
Try to focus on one original idea in your paper. Summarize it in the abstract, introduce it
in the introduction, explain it in detail in the body, and draw some
conclusions in the final section.