I often get the question: What is the best way to get started?
Well, that all depends that what you would like to learn. IT consist of so many different fields, that trying to learn all of them will simply not be possible. So, what I suggest is that you deside on which genre (Web, Bin, PPC, ect.) you would like work with and then strictly focus on that for a period of time.
Lets share some great traning labs, so that we all can train and become even more skilled.
Attack-Defence / All-around
NB! The categories which the links have been put into, do not mean that they necessarily only contain that type of challenge.