I don't remember if I lost a lot of things when I first started diving, but the first week as a working diver I lost 25% of the stuff I took in the water.
Ashamed and concerned about giving the wrong impression, I decided to solve the problem by strapping everything to me. The senior diver told me I was NOT to strap anything to me, so what am I going to do? I asked. With the hardest look anyone has ever given me, he just said: Don't lose your stuff.
Well I managed to follow his order, looking back I realize that what I did was mainly slow down and be more deliberate about all my moves. Set a routine, get your gear in the bag following the same order, gear up the same all the time, get in the water without rushing, be more aware of yourself and of your surroundings, slow down to a fifth or a tenth of your present speed.