How to get Free .Edu and .Gov Backlinks?

Do you know you can easily get the .edu and .gov links at free of cost? Although it is a secret, it is known to most of the make money online webmasters including johnchow and problogger.Search engines, especially Google will give you better placement if you have strong sites linking back to you. i.e. you can get descent PR in the next update. Just now discovered the technique of finding .edu