1. Put it in a Drawer
2. Print It Out and Switch off Your ComputerThis is not a metaphor. Who prints out scripts? You. Print out the script.
Why? I find that reading scripts on a screen can be very unsatisfactory, not least because the internet keeps popping up, poking you and tugging at your coat. An easy way to avoid that is to print out the script, turn off your computer or walk away from it. I know. Don't freak out. How do you make changes without a computer?
The other reason I like to do this is because reading a script on your screen might encourage you to start making changes before you're ready. It's better to read the whole script through - ideally a couple of times - so that you can get a sense of the whole thing and whether or not it works overall.
3. Summarise Your ScriptWrite a summary of your script, that's scene by scene or page by page. This is a new one for me. I thought I'd try it the other day and it really helped. You may well have written an outline before writing your script. But scripts don't always follow outlines. That can be a mixed blessing. So throw away that outline (metaphorically) - and write a new one based on the script you have actually written.
I find this helps me to get to the end of the script without trying to make too many changes and helps me see it as a whole. So make a note of the scenes, and how long they are. Summarise what happens in each scene. Key jokes and moments. Where are the turning points?
Doing this, you might spot that the key moments come too close together, or too close to the end. Or don't even come at all! You might discover that nothing really happens until page 12. It really needs to happen on page 4. You might discover one character vanished for 20 pages. Fix that. You might need to make some cuts. Or you might need to jiggle things around. Or a bit of both. The structural problems should become obvious. Or at least more obvious.
I'm about to do 2 and 3 to a script right now. (Be Lucky for BBC Radio Wales, since you ask). I wonder what I'll find?