I feel as though my startup times are getting slower, and things are taking longer to load when I boot up. Is there a way for me to make my MBP have the same loading speeds as before or as close to it as I can. I know that computers get slower over time, but there are ways to do maintenance on Macs right? Can someone recommend me some applications or do I only need something like Disk Utility (I don't really know what to do with it though)? Thanks.