I was just wondering if there was a way to increase the number of spells that some one can prepare, in this case, for a wizard subclass. I currently can't find a way to do this, so i'm not sure if I'm overlooking how to or if this is something I can't do as of now. If there is a way, please let me know.

Look here. The only way I can think of would be to ignore the “don’t do this” recommendation about adding Spellcasting to classes that already have it. PS, the reason they tell you not to do it is because it breaks the system. 

The only way I managed it for a Wizard subclass was by adding it so it was always prepared. Not what I was going for, but not the end of the world either.

thanks guys, I play around with it some more and see what I come up with. I'll likely have to do Baz's idea where I have X number of spells that they choose spells to always have prepared.