I pack my gym bag the night before because I work out so early it allows me a few extra minutes of sleep. Since I work out first and then go to work my gym bag might be packed backwards from most people who pack to go to the gym. I pack to go to work.
The first thing I do is decide what outfit I will be wearing to work, I make sure to have all aspects of that outfit including shoes are in the bag. Next I get together any jewelry I will be wearing with the outfit. I place all of that in the bag. Now I add in my personal care items; deodorant, hair products, make up and face wipes.
I also double check any after work plans I have to ensure I have what I need for that as well. Maybe an outfit change or layering of clothes, sometimes even another workout.
Once I have it all together I put everything in the bag and place it in my closet. I get my workout clothes and shoes for the morning and place them on top of the bag. This way in the morning I go into my closet and get my workout gear on, grab my bag and after washing my face and brushing my teeth I am ready for the day.
I need all the extra sleep I can get!