Here are some of the consumables I use for my projects, I will be moving here any parts that I find myself reusing time and again.

Solder / De-Solder

lead free solder wire - Lead free solder wire. Make sure to adjust the soldering iron to work with those, at least to 750. this one is ROHS compliant 

rosin flux paste - Makes soldering easier. This one is ROHS compliant.

desoldering wick - Good for cleaning up small amounts of solder or holes after removing the blobs with the solder sucker

tip tinner - to keep the solder iron in tip top condition

Glue / Cover

liquid tape - helps to prevent shorting

cyanoacrylate glue - mistakes happen, and that is the ctrl+z

3:1 heat shrink with glue - look for the one with glue, it is much easier to get it to stick

3D Printing

nozzle socks - I am actually not sure that does anything, but the cool kids put in their mk3s, so faking it until I make it here

99% ipa - if I have a secret to get pla to stick to a bed, is this thing

Screws

M2 and M2.5 assorted screws  - most Raspberry Pi related parts appear to use M2.5, so having a set of assorted short screws comes in handy. I like the dark countersunk flat tops, but any will do.