Two simple data:
1. a 3° slope equates to a descent rate (ft/min) of 5 times ground speed (kts)
2. (w/ full slats/flaps) the TDZ should appear (about) in the middle between the upper and lower edges of windscreen. Just keep it there!
This helped in PUJ, POP, SSJ, and other places with poor lighting.
Happy landings.
