I'm finally going to do it...
How long have you planned this?
I've been thinking about this plan for a while...
It is good to follow through with your plans. People admire those who stick to their guns.
No plan survives the first contact with the enemy. There's always the chance for something to go wrong.
I am not sure what your plan is but it sounds like it might be vengeful. If you are considering harming someone, don't you think you should consider talking about your issue first?