Tools I use

Craft Knife & Scissors: The main tools I use to cut out parts. I use my craft knife more than my scissors, as it’s more comfortable for me.
Craft Glue & Toothpicks: Typical tacky glue, and the toothpicks are useful for applying glue.
Colored Markers: Used to color the edge of pieces, making the white edge less noticable on finished models.
Tweezers: Used to handle the smaller parts, and to help apply pressure to glued parts.
Paper: I use matte paper with 106gsm. It’s sturdy enough for me and isn’t too difficuit to fold.
Copper Pellets: I sometimes use these to help models stand on their own. While they’re useful, I try to design my models not to use these weights whenever possible.
Assembling Tips
Some small tips that I’ve learned for making papercrafts.
Only fold glue tabs to have a cleaner look to finished models.
As mentioned before, color the edge of paper pieces with a colored marker before assembling to make the edge less noticable.
For smaller parts, like hands for example, It’s easier for me to cut off the glue tabs and to glue the edge instead. This reddit post goes into more details.
I use matte acrylic spray on my finished models to help lessen discoloring over time.