Ok, I'm starting this thread as a single location for tape tips, please add at will.

Here's a few I use:

Darius:
"Use a seam roller to flatten edges and adhear tape to lace before attaching to head"
I laughed when Darius suggested this as that is what he was doing, but much apologies I'm a fool. Been doing this since he suggested it and it is the key to using only tape at the hairline.

"Use a tape contour at the hairline when making you template" This saves time when attaching tape to hairline.

Xeon:
"When using Supertape stick side printed with "Supertape" to the lace, it has less shine than the other side"