Any method to only turning on processes required to run the Mac?

[Suno]

So, in other words, a way to have unnecessary processes running in the background to shut off and just have the bare minimum. Things like notification center, calendar, app store notifications (like OS X version upgrades).

 

[dusk007]

Most of the times these other processes don't do anything anyway. MDS the indexing service is the only one that occasionally goes nuts but you loose spotlight. It can be shut of by simply excluding everything from indexing.
An update service turns on every couple of weeks and then runs for a minutes. You don't make anything faster by shutting it off.

Are you trying to save RAM? There isn't much to gain here. You'd be better served just upgrading RAM. Is isn't that expensive.