Having been mobile myself for about 6 years, it was really important to me to be very organised. I had a separate box for every treatment and a couple of sets of essentials in those boxes, this way I didn't have to take everything and I could just grab and go.
Ie; mani/pedi with all the lotion & potions, tools, nail polish remover etc. I'd have my polishes separate in case I just needed to do a file and polish, then I'd take a couple of extra bits instead of the whole mani box.
Shellac box would have all the bottles, tools scrub fresh etc
Nail art box with all my glitters, foils etc so it can come along with any treatment.
Same thing for my other beauty treatments.
I hope you get the idea and I know it means doubling up on some stuff but that's what I found the easiest way not to forget something, I'm such an air head and it's embarrassing when somethings forgotten! I'm so glad that I don't really do mobile anymore as I work from home and have everything here.
Karaxxx