Put jquery plugin script in .js file?

Put jquery plugin script in .js file?

Hi, I'm using quite a few great jquery plugin on my site. But I noticed the javascript in my html is growing quite big. I know the normal way to use a plugin is to include jquery-->include plugin .js file--> then put something like below to my html file. I'm a total beginner to javascript. is there a way to put whatever javascript into a desperate.js file? I'm using several jquery plugins, and this bit of javascript doesn't look very tidy and manageable me anymore. 

Thanks for the help

<script type="text/javascript"> 
    $(document).ready(function() {
$("#myplugin").fdsa({ });
$("#myplugin2").fdsas({ });
$("#myplugin3").fdsaw({ });