Do you mean what do you take for work, or for when you're downroute?
When I do stopovers I take a book, magazines, mp3 player, camera, bikini, beach towel, evening clothes, day clothes, underwear, toiletries, change of uniform etc.
When I do shorthaul here is what I take in my crew bag (which is the size of a small suitcase):
Cabin shoes
Apron
Cash wallet and float
Oven Gloves
Fleece (to wear in galley when it's cold)
Plonky Kit
Shoe Polish
Sewing kit
Spare tights
Spare uniform blouse
Underwear (in case of unscheduled nightstop)
Toiletries (again in case of unsceduled nightstop)
Flip-flops, light trousers and t-shirt (as above)
Hi-Vis
Torch
When we do longhaul and stopover we are allowed to take another suitcase as well as our crew bag. The suitcase goes in the hold and our crew bags go in the cabin overhead stowages. Hope this helps!!