Macbook Late 2009 SSD Question

First post on here and its a pretty important question. I purchased a SSD for my Macbook late 2009 2.26ghz and I'm going to back up with Time Machine. Once I got it backed up and I install the new SSD and I boot the computer up what do I do from there? If i don't have the OS Disk can I put this http://support.apple.com/kb/dl1433 onto a thumb drive and install the OS that way? Im just confused about boot up right after installation. Is there any specific things I have to do?

 

yeah i found out about that after i ordered all the stuff.. i dont wanna put that external drive to waste so im gonna do it with Time Machine. but once i boot up after the install of the new SSD what do i do?