How to increase my download speed?

Try downloading in the early morning when most people around your area are asleep....The speed should be faster at that time

I casn't give links yet but Cnet Download.com has a free download manager that works well.

You will get the download speed that your ISP has already defined for you.There is no way you can alter that.There are little things that can be done for example while browsing , leave the download for later and schedule them some times when you are not using your internet connection so in this way your files will be downloaded at your rated maximum speed defined by your internet service provider