Tortious Interference: A Nightmare Unfolding

Kuch khas hai... (something's fishy)... I've been studying for days, but this one concept of Tortious Interference still has my head spinning. Is it just me or does anyone else struggle to distinguish between unlawful means and unlawful objects? If someone intentionally interferes with a contract between two parties, is it tortious? But what if the interference was done with lawful means? It's like trying to navigate a maze blindfolded. And what about the difference between actual and anticipated harm? My notes are a mess, and my mind's a jumble. Does anyone have a magic formula? Please help, chalo (let's) break it down before it's too late! Exam's in three days, and I'm freaking out.