The Creep/Gank Decision (Game 10)

Game 10 - WIN (Overall Stats since Blog-Start: 9-1)
Current League : Silver V ( Promotion 1-0)
Played Champion:  Zac ( Jungle )

Game Stats: 

The Creep/Gank Decision:

Now this is something you get a taste of in thousands of games. It's basically what differs a pro and a really good player. 

Everytime you run to another Lane to gank or join a gank you have to consider that you lost gold due to not creeping. Now here its getting complicated, unless you know you will definitely get a good Gank off (Helping your Teammates by forcing any1 back, helping them win their lane or even getting a kill) it's not worth to creep at all. I'm having a lot of trouble to do that since i started playing LoL because i cant judge the situations as good as i could in HoN, but this is getting better from Game 2 Game. 

So basically just keep in mind:

Is it worth trying to gank that bastard, will it help our Team to win? Am i sure about that?