Help! Organization issues!

Help! Organization issues!

Can anyone give me some tips on how to organize penpal stuff? I need to figure out how to save letters, stationary, stickers, pens, and basically all the materials! i can't seem to come up with anything other than all my notepads and a few pens stuffed into a shoe box! At the moment, I have all my letters put in the bottom drawer of a plastic set of drawers. And also, I need some bedroom re-organizing help! I'll be getting a few new fish tanks, some small betta tanks as well as 2-3 tanks the size of the goldfish tank. here are current photos:
The branch is thinned out slowly.

The branch is thinned out slowly.

View from the couch

View from the couch

My Bog Garden

My Bog Garden

tomato sprouts

tomato sprouts

My room!

My room!

My rooooom!

My rooooom!