To office on a bicycle

An amazing start of the day as I came to office on a bicycle for the first time.
At first I was kinda scared that 20 kilometers will be too much for me but it went prity fine. At this point I am not exactly sure if I can come regularly like this but for sure if I can do this even two three times a week it will bring a drastic improvement in my fitness and stamina.
Few things that I feel are important ...
The office bag should be as light in weight as possible
Tyre air pressure should be perfect
Helmet is a must for safety
At least 500 ml water glucose mixed
Should be wearing shorts and t shirt