Make every effort to avoid adding algae to my tank.
When I was running my 34, I would dip corals but not remove any algae on the plug or rock. I ended up with a bryposis nightmare. Now I remove the coral from the plug. If that is not possible, I dremel the rock/plug and glue any remaining algae.
Avoid wild sps colonies
I think I'm done with wild sps colonies. I've found frags do much better. I've been able to keep some colonies > 1 year only to have them RTN while everything does fine.
Change water more frequently
I try to run a very low nutrient tank. I recently updated/upgraded all my equipment and I've had no trouble removing phosphates, nitrates, etc. This lead to some laziness on my part and I stopped changing water frequently. Even though I dose ALK, CA, MAG, I wasn't replacing trace elements. After a conversation with Robert, I realized I was Iodine deficient. Long story short, changing water removes waste AND replenishes trace elements essential to color, growth and overall coral health.