Take a deep breath before you start. Try to relax your tense muscles. Don't rush around trying to look smart, take a few extra moments and get organized. My first days as a nurse I followed a RN who was in her 70's and had really bad artheritis. She walked with a limp and everything took her a long time, because she hurt. I was taking her spot, because she was retiring. She was a very lovely nurse and I really liked her. But she could run circles around me. Why? Because she was organized, she obviously knew her stuff. She would go into a room, for instance to replace a indwelling cath, and she had all her equipment. She had done the procedure a million times and it was quick and easy for her. I however, trying to emulate her, trying to look smart, could easily run to the room and get started, only to realize I forgot the syring to empty the ballon. Well, I figured a quick run back and I still will have it done in a jiffy. Well when I got back I realized I had nothing to put the water into from the ballow - another trip. It took me forever. But, it didn't take me long to relize my pride was getting in the way of doing my job. So, I started to say to myself - I am chaning a cath, what equipment do I need, and then double check that, then I woiuld run to the room. Of course it took me a while to perfect my cath skills. I am still learning, there is a new post on how to insert a cath with out pain, and I learned from that (after 18 years).
Don't worry that you have to stop, before you start, and do a quick inventory. Most of us all had to do this too. Actually it will save you much time, and eventually it will be second hand.