Tips:
I don't have a lot of tips, but if people write in with questions, I might be able to make a tip out of it ;)
Grendil@BBSGameDev.com

1. Break your program into smaller TPUs instead of one big file.
Turbo Pascal can only handle smaller TPUS. I try to keep mine below 30kb. DDPLUS.TPU is 37kb, but it's still good to keep your file size down. Or else you'll run into a compiler error.

2. Set the linker in Turbo Pascal to Disk.
Make sure to set the linker in Turbo Pascal to Disk. It's under Options, then Linker. It starts off set to Memory.