This is my build to warwick that i use usually, i wish that this helps someone wondering what to do with ww.

On runes i use full attack speed, which isnt usually the best but i like it, jungle goes well with them because 38% attack speed is alot.
You can use armor and dodge runes too.

On summoner spells ofc you use Flash and smite, its cool when u do flash and ulti combo.
Smite makes your jungle easier.

On jungle ww is imo the best champion.

On jungle i start at Blue buff, and ih they dont have jungler you can go first to enemy side blue buff, it helps jungling and they dont usually gank that. Then i take dogs and go to the wraths. After that you can take two golems or red buff, keep doing that, you can also go to lane if solo laner have to go to base. when you got 1050 you should go to base, buy madrezs rasors and boots of speed, if you got more money you can buy some wards if they like to gank.

On jungle you dont have to focus on last hits, only kill those bastards as fast as you can.