Laptops are too clunky. I use a homemade version of the Gamemastery combat pad
. I bought a letter-sized dry-erase board and some magnetic dry-erase tabs that I write player and monster info on and I just move them around the board to represent initiative and conditions. I've gotten plenty of positive comments about how my games stay "on track" and we finish modules and adventures quicker than other groups running the same adventure.
Plus, it doesn't need batteries or an electrical outlet.