Custom Setup ???

I have recently decided to reformat my system … Get rid of all the garbage and clutter that binds it up, and make it simpler. What I was wondering is if there is a way to perform a custom install (similarly to what you would do with say Microsoft Office … where you would choose which particular components of the program you wanted and didn’t before even installing). If anyone knows anything about doing this, any commentary would be greatly appreciated.

Thanks in advance.