If your Mac has v10.7.1 installed as your profile indicates, updating your system software may help. Your Mac should be running v10.7.5.
Either click Software Update from the Apple menu top left in your screen, or, open System Preferences > Software Update then click Check Now.
Now enough free disk space can slow your Mac down.
Click your Apple menu top left in your screen. From the drop down menu click About This Mac > More Info > Storage
Make sure there's at least 15% free disk space.
For the trackpad ...