This is not involving any cost (chargeable in some websites) and also not having any time constraint. Also some RSS feed (Really Simple Syndication) available in the most of the website, once subscribe the RSS feed, this will update your mailbox regularly with all latest updates & news.
Professional institutes also sending update mails for their members regularly.
As professional & professional students we need to develop our professional circle.
This can be done through professional forums, while expanding your circle you may get different kind of persons having specialized knowledge in each area, this will give us to get help & guidance from them always when we are struggling for something and develop our knowledge.
In the field of finance & accounts as professionals we need to update our knowledge and knew the regular changes in our field.