There are three things you can do to make your handwriting clearer and easier to read right now.
1. Get a pen that suits your hand and your writing style.
2. You probably have picked up a million bad habits with your joined up writing, so union your letters and let your words be understood.
3. Take your time. Writing is not a race. The idea is to leave marks that you and others can interpret as words. Even so they can be read in 1000 years time!
take a look at all my other handwriting videos here: http://bit.ly/betterHandwriting