Fish: I would drip acclimate them. I have lost fish with just temp accliamation. I got a roll of sillicone tubing and drip my fish now into a clean bucket or jar.
Corals: They can be temperature accliamted in a half hour or so but I like to drip them anothe rhalf hour. I woudl inspect each specimen carefuly since i have found hitch-hikers. Some may suggest dipping them in Iodine as well.
Inverts: they need to be dripped acclimated since they are more sensitive than anything else you buy.
Clean up crews: Cna be temp accliamted and then some water addition slowly to the bag until you reach twoice the size.
Placements: For corals, you should vision location before placing them. Also be cautious of the species. Some need sandbeds and some need rockwork. Some need more flow, some need less.
Placing new corals at the bootm is a good idea for a week then placing them in the permanent location later. For light intensive corals, you need to figure out what lighting the lived in before and then move them up slowly to the top of your tank. Depending on your aquascaping, you may need to use marine safe silicone to adhere the speciment to the rock. I like to use the rock layout better, but some corals need some solid support.
For fish, inverts and clean up crews, they can be dumped in slowly into an open area to avoid crashing them onto other things. All animals get freaked out about your tank at first then start to move about slowly.
I keep a notepad in my tank storage area for such references sometimes. We can be so forgetful at times.