new field tech looking for input from the experienced ones. mistakes you've made. things i should be aware of starting out.

i have a ccna and landed a field tech job. i've been familiarizing myself with networking tools a bit and have a set of my own, but i think it'd help to get some input from field techs. even the most obvious advice helps.

what are your more common and standard procedures in regards to wiring, switchboards, patch panels etc. what kind layer 1 and layer 2 work do you commonly do?

also, dress code? i'm thinking of showing up in business casual clothes(chinos, long sleeve button up shirt) as a safe bet, and then adjusting down if i need to.