i don't understand his first one though. i thought both linux and bsd greps had the -H option (show filename).

here's some more:

   1. sed t file instead of cat file

   2. echo dir/*|tr '\040' '\012' instead of find dir

   3. echo dir/*|tr '\040' '\012' |sed 's/.*/program & |program2 /' > file; . file instead of xargs or find

   4. same as 3. but use split to split file into parts.  then execute each part on a different cpu.