You can either grind low level mats, you could also sell them, obviously purchasing more bag space from the pack merchant will also help, focusing on just one or two crafting skills and ignoring items for other crafting skills can also help and also use your bank, you can also expand that.

Also loving the beard! I have a long beard irl as well!

Aye, the problem I face is that I started the game at launch and played here and there. Some of my bag space is filled with CE Treasure Maps, stuff given from Crates and others odds and ends. Also hoarding stuff to research later too.