In recent months my macbook has been steadily running slower.
It's about 2 years old and gets heavy use so my initial suspicions are that maybe the hard drive is starting to get old. I used the disk utility and it said the disk was fine though.
I dont have an especially large amount of applications running at a time, about 4-6 (plus whatever background stuff is going on).
As you can see I am more or less speculating, is there a tried and tested way of diagnosing this stuff before I put in an SSD (can the Apple retail stores do this for me?).