Recently you have noted that yours new 2010 13″ Macbook Pro has been pretty sluggish on doing everyday tasks and you see the multicolored pinwheel very frequently. Here is few things you should check:
* How much RAM do you have? What are your Page Outs? (use Activity Monitor)
* How much free hard drive space do you have?
* Use Activity Monitor to see what processes might be using system resources.
* Repair permissions. Troubleshooting permissions issues in Mac OS X