Laptop Upgrades

Over the last couple of weeks, I have been considering buying upgrades for my laptop. It  runs perfectly fine, but it has a hard time running programs like Word and Excel. Perhaps my laptop just needs a better processor or a mobile graphics card. Maybe next term when I am sent my financial aid, I will take some time to buy a graphics card and a larger harddrive for the laptop. It only has 75GB of HDD space. A harddrive I would find suitable would be at least 300GB.