First, determine what you want to do with the laptop pc.
If you want to always take your laptop to your office, or business place, then you might want to consider going for a laptop pc that has some microsoft office features. Or if you are a student who needs a laptop computer for study, doing assignments, writing projects, and some school stuffs, then you might want to consider purchasing a laptop notebook that is quite cheap, having a medium size hard drive space, a little fast processor, and other medium features.
If you need you laptop pc for some high programming jobs, like designing, programming, website creation, and other high utility work, then my advise is you go for a laptop pc that has all the visual effects that you need. You should also buy a type of laptop model that supports your entertainment desire.
If you want it for gaming, and other multimedia effects, then all you need is a laptop computer that has all the multimedia effects you need.
Second, consider your budget. Your buget has to be considered if you want to buy a laptop. There are some laptops that are not so expensive, and having medium size features, while on the other hand, there are very expensive computer laptops that will make someone go bankrupt.
All you need is a reason to buy a laptop, and you are on the way.