One of the easiest ways is to simply create content for other webmasters. Like many people are doing on the Content sub-forum.
Well, if there's a subject that you are truly passionate about, open a blog and write as much as possible quality content. Market your blog every day and the results would soon follow. It took me 2-3 months before I could make over $100 month from blogging, but I have been increasing my income ever since. Another way to make $70/month is by writing for a blogging company http://www.creative-weblogging.com/50226711/get_paid_to_blog.php Another way is by opening bank/credit card accounts in the US like this guy: http://www.mymoneyblog.com/archives/2006/09/how-much-money-do-i-make-on-the-little-stuff.html
Probably should get a day job to start off so you can easily make that money right away. Then you can concentrate on online success after you no longer need to worry about that monthly requirement.
There are hundreds to thousands of ways to make $70 in a month. 1) Freelancing - Design / Work for others 2) Set up a blog with Adsense on it and gain traffic 3) Buy an established site already.
What do you good at? Writing, designing, programming? Offering a services to people is the easiest way to get $70 or more in a month.
Is anyone else sick of these threads. What do you think some member on DP is going to hand you a golden key to making $ online. This is $70 your talking about. Not a huge amount of money. If you are good at anything try working with that. If not then you need to find something like a website that you can be unique in.
$70 can be achieved very easily. Read the threads here on dp for ideas and you'll be making more than $70 a month in no time!