The one thing you must know about twitter is you can tweet more than 140 characters , Yes this is true . Twitter is one of the best social site to express your thoughts via tweets . My one Friend who use twitter daily he asked me a question " How can i tweet more than 140 character "   . You can follow my Friend here @NadaanParindey If you want he is a nice guy :P .

Ok Come to point How to tweet more than 140 characters .
Actually twitter allows you to tweet only 140 characters but there are some apps by using them you can  tweet more than 140 characters .  But before starting i want you to know how this works . There are some apps which splits your longer tweet into several parts and tweet them one by one and there are some apps which convert your tweet into image form , as you know in new twitter we can post images :)