Now that I've shared what's in my party toolkit, I thought I'd compile a list of all the items you have in your party toolkits (thanks for all the comments) so everyone can see and maybe add to theirs.
3M Mounting Strips - Love these, have some. Must get more!
Hot glue gun - I have to admit, I've been a little afraid of them but it's been mentioned a bunch of times, so I think I must get over my fear.
Rotary fabric cutter/Pinking shears - Smart idea.
Silhouette Craft Cutting Tool - One day...
Cricut Personal Electronic Cutter - One day for this one, too...
Fishing line - I love how this makes things look like they're floating in space.
Clothes Pins - I absolutely need some, especially the mini ones.
Circle cutter - For different sized circles.