Just means the speaker has something to say, but before doing so (i.e. "give it away") the speaker wants you to do something first. Think of "giving it away" as "to reveal/ expose something".

I agree with previous answer, but there is an interesting second idea here. To give something away can also mean to hand it over free of charge. Given that there is a reference to a free no-tech life hack on the first line, there is an interesting echo here of the possible second meaning. But I think Darryl Wee's answer about reveal/expose is the primary meaning.