well, there is lots of things you can do to make your computer / internet faster. However, they are completely unrelated, so I will start with ways on making your PC run faster. Ok
Try defragging it. DO it several times the first time you do it, then every fortnight from now on. This will decrease small, unusable disk space, therefore freeing up the computers drive / s.
Buy more RAM. The average amount of RAM for a PC at the moment is 2GB. I am using 4GB. RAM is relatively inexpensive, and for laptops, $170 should see you with at least 2GB RAM.
Make sure you have at least 15% of your hard drive free. Programs can then use the space and shift files around without having to run out, or run low on disk space.
The most effective, and free method of boosting your computers speed is by "formatting" the hard drive. This will erase EVERYTHING off your hard drive, so make sure you backup programs and files you want befre you do it. How do you do it? Simply put the Microsoft Windows Vista DVD into your computers CD/DVD drive, and it will give an option of formatting the drive. Select the option of "format drive to entire partition". Once this is complete, windows will re-install iteslf again. Then you will start from scratch. Much faster. As time progresses, it will slow again. I, personally defrag my computer every fortnight, and format the hard drive every 6 months or so. I just did it last week, so its nice and fast again :-).
And, by the way, Service pack 1 is now available for download for Vista, that will decrease freezing as well. I think vista is pathetic. It is year 2009, yet the worlds biggest computing company can't even release an operating system that doesn't freeze at least once every hour.
Now, for internet.
Obviously, purchasing a faster type of internet is going to boost your internet speed. And there isn't much you can do to change internet speed. Having a good modem will be an improvement. I don't know what are the best modems, sorry, but maybe try googling it and find out?
Also, since you are on a wireless network, if other people are using the internet on the network, your connection will be slowed as the port will be shared.
Keep the laptop close to the access point for the network, so you have 100% connectivity, and therefore 100% possible speed. Um, when downloading, use torrent files, rather than typical download files you use through limewire, etc. Torrents can be found under sites such as btjunkie.com, and downloaded through a torrent host, such as bitcomet. (bitcomet.com will give a free, legal download).
Also, try switching internet browsers. Internet explorer is ****. it freezer non-stop and is slower than mozilla or oprah. Personally, think Opera is the best. It rarely freezes, and when it does It fixes itself up quickly.
And slow gaming is also because of slow internet connection.
Other than that, there is no ways to speed up computing processes. Hope i helped.. btw what country you from???