Some kind of humidity dome- Some here have used a 2-L bottle with the bottom cut off, over small pots- I used an upside down 1-gal freezer bag, worked OK but you must prop it up so it doesnt knock over the cutting. 
    Most of the pros suggest misters but next to a humidifier or under a dome with occasional misting should help if you dont have an actual mister aparatus. 
 good luck!