Logic is the foundation of all justifications. It's what separates us from the mindless ramblings of the non-justifying masses.
Constructing Arguments is the first step in the process of justifying your point of view.
Finding Proofs to back up your claims is also a must.
Setting Assumptions is key to not getting caught in your own web of deceit.
Drawing Conclusions from your findings is the final step in the process.
Remember, justifying with logic is a delicate process. Be careful not to Go Wrong in your justifications.