Long Slow Distance Training (LSD)

I have trained for two weeks without a proper program..
This was fine as my initial goal was just to complete the PBIM half marathon..
Somehow, i am unsure if i could finish the 21km event within 3.5hours..
Therefore, i searched for a suitable training program for myself..
And today, I found a training method which should fit into my daily schedule..
It's long slow distance (LSD) training.. you can read more on LSD here..

The rules:

• No fewer than 3 runs per week
• No more than 5 runs per week
• No less than 1 hour per run
• No farther than 15miles (24km) on any run
• 1 run per week lasting more than two hours or more (after month 5)