Bioinformatics is no longer a brand-new research area. It has already passed more than a decade. Now, you need to be expert in diverse disciplines to be a successful bioinformatician. Knowledge in biology, biochemistry, genetics, computer science, mathematics, statistics, etc. are essential. Usually, new researchers do not have expertise in all these fields. And, it is often impractical to take formal courses in undergraduate or graduate studies. Free online course curriculum can help a great deal here. David B. Searls compiled a comprehensive online bioinformatics curriculum [1]. He listed out free online course offered by different universities or organizations. You may like to take courses from here which you think would improve yourself.
Reference:
[1] Searls DB (2012) An Online Bioinformatics Curriculum. PLoS Comput Biol 8(9): e1002632. doi:10.1371/journal.pcbi.1002632 [link]
