TS,maybe u try go survey around the place u plan to start the business first.u may get some idea from there

dont ask such a general question la.
dont expect people will list out all kind of business nature in the world in a forum
if u are expecting a good answer, then provide others with a good info of yourself.

what kind of working experience do u have?
what kind of interest and hobby do u have?
u plan for full time or part time?
u want a business or just an investment?
u prefer service or selling item?

as cherroy said, there is too many topic like this.
u r like putting a big blanket under the sky and expect gold falling onto it
there is no way it will works.

here is my tip. go for edyek thread and keep reading on other people experience. maybe u can get rough idea on how to start:
Small & Medium Business
Passive Income

link above is good for reading

No skill set no worries, skill can be learn.

Do trading, import stuff from China and sell here. Study what are stuff needed by the local people but no supply.

I dont know the conditions in the place that you stay, but in my place in Sabah, many kampung still have no electric supply, so i import solar lightings and solar charging system from china and mark up 50% and sell to them, very good response. Best is i dont need to rent shop, just sell at local pasar.

See? Just simple market study.

well.. may i ask? how did u get the supply? by Alibaba.com or seaching by yourself in china?

Limbang, kapit, kanowit - of these 3 limbang would have better chance of running a business due to population size and proximity to Brunei and Sabah. Sarawak interior also don't have electricity maybe you can try suknat's idea. You didn't say what you are doing (work experience and skills) and where you are/were located.

hello...have you start up a business?

car wash is an option...