Razz Tips

A while back when i was learning how to play razz someone explain it very clearly and probably the shortest explanation i heard from anyone he said
Hands in razz are based on the highest card you have in your hand
you want 5 out of 7 cards to be different and low
The best hand you can have is A,2,3,4,5 because 5 is the highest card you can have to make 5 different cards
So even if you have A,2,3,4,8 | | 3,4,5,6,7 will still beat it cause 7 is lower than 8

while true, i base alot of my decisions on what my opponent is showing and what low he/she could possibly have in relation to my low instead of just playing my cards