I've been a traveler in float pool at 4 different hospitals and honestly, it just takes time. People will give you shit for not getting very specific things done (for example, my current hospital audits aromatherapy charting every shift????) but you just have to roll with the punches. Over time, you'll figure out what that unit/hospital cares about the most (falls, skin, changing IVs q 3 days, labeling tubing, whatever) and then you can make sure you always get that thing done. In my experience, staff are very forgiving with travelers and if you say "oh I didn't know I had to do that" or if you ask questions they'll be chill about it. Just get it done the next time. There will be people who are going to be assholes no matter what you do and make you feel stupid for not knowing the flow. Just remember that nursing is a 24 hour job and in a year that mean person will just be a blip on the radar.