Splitting Document into Odd and Even Pages
This needs two commands, one to grab the odd pages, and one to get the even ones. Mine look like this:
pdftk hints.pdf cat 1-endeven output hints1.pdf pdftk hints.pdf cat 1-endodd output hints2.pdf
This leaves the original document intact, and creates two new ones with half the pages in each one.
Combining Documents With Alternate Pages
The interleave is a single command in pdftk, using the shuffle feature and giving two documents to use:
pdftk A=doc1.pdf B=doc2.pdf shuffle A B output complete.pdf
This creates the file
complete.pdf using alternate pages from each of the two documents you provide to the first two arguments. Very handy, either for the odd/even processing case I mentioned above, or I have also used this when printing two-sided documents which are made from different front/back sources.
If you use these, or have any tips to add, please leave me a comment - it's always interesting to see what others are making with my favourite tools.