Help me with my macro shots (PS630)

[Xandernfs]

Here are some macro shots that i took and i'm trying to get the hand of this. I am using a cannon powershot 630. I've found that i can only take okay macro shots when the object is rite in front of me. I can't seem to get any of my other corals. I am new to this whole thing and have done some reading too. I have a tripod, but i need to know what settings will give me the best shot. Any suggestions?

Thanks,
Xander

 

[Xandernfs]

No opinions?!

 

[this is me]

Looks fine to me on the first two. The third one is out of focus