Debt to Income Ratio (How far to leverage?)

[Austin Hall]

Hi,

I am new to real estate investing - BUT, I just closed on my first deal! Very exciting! I am already looking forward to doing another deal, but am wondering how far is 'too far' to leverage? (i.e. how much debt is 'too much'? - even for good cash-flowing deals!). 

I expect the answer has to do with how much risk one is willing to take, but I am curious to hear experienced investor's "rules of thumb" or take on this question! Curious to hear about other's strategies? 

Thank you for the help in advance!!

- Austin