Oh yea -- the scissors are a must! And great fun in getting back at siblings when they come to visit at your house & try to use them.
Don't mind me, just a repressed leftie gettin' back at her sis. :LOL
The writing thing -- you may want to help her learn to write while dragging her hand under the line of script:
words here xxx <-- pencil tip
hand down here
This will contribute to a little less control at first, but will be much nicer in that she won't have nasty pencil rubbings all over the side of her hand or arm.
Maybe with toys you'll want to do more of avoiding toys that won't work -- oh - you'll want a lefty baseball mitt if she plays at all (even just gym class, when the time comes), since no one will have one for her & it's about impossible to use a righty one.