Take the location, convert to string, and split twice:

vidID = document.location.toString().split("v=")[1].split("&")[0];

Given a log file with a date in the first column, chop up the file into separate file:

$ awk '/^[0-9]/ {print $0 > $1".log"}' logfile.txt

If you have a string that has characters that the shell won't like, you can do a substitution on them:

$ awk '{gsub("/","_",$1); print $1 > $1".log"}' logfile.txt

If you want to split screens and only need a few lines for one of them type the following after you use your control key (Ctrl+A by default):

:resize -10 (removes 10 lines)

While running screen, run the following sequence:

C-a S

Then run the following sequence to change focus:

C-a C-i

To collapse the splits to the one you're currently on:

C-a Q

Use split to move blocks of text around rather than having multiple terminals open. Open the file you want using the split command:

split: path/to/file

C-w and then k or j will move you between vertically between the buffers when you are not in insert mode (up and down, respectively). For example, this makes moving text between files much easier.