Ah, I am bag lady! I have everything in my bags! Yes, bags.
I have a small handbag which contains:
makeup
toothbrush & paste, deodorant, aqueous cream (for washing delicate ladybits) and a little hotel showergel for if I end up in one of those bizzare bathrooms with no soap
handcream, lipbalm and sanitiser gel
umbrella
paracetamol, plasters, throat sweets etc.
diapragm (I use this instead of sponges)
spare glasses, contact lens case with solution, eye drops, spare lenses
tissues
taxi money home - never rely on the client actually paying!
phone to keep on during bookings (only my security contact has the number for this, I switch my other phone off so it doesn't disturb us)
spare stash of condoms, various sizes, and lube
little sewing kit (one of those hotel ones)
notebooks and pens
a lighter - even if you don't smoke this is useful for clients who do, but would waste 15 mins looking for their lighter then trying to light their cig on the cooker
chewing gum
business cards in little holder
keys to incall apartment and home
ALSO this is where my money goes when I get paid - this bag does not leave my sight! If I use the bathroom this comes with me (if the client questions it just say you want to touch up your makeup), and if I had to leave in a hurry this is the bag I'd grab - but if I did have to leave it then I don't have anything with my address or real name in there, and I have a spare set of keys at a friends.