Your first suggestion is decent enough but your second suggestion...Putting into CPF at 18 is just crazy.
Not at all! There are some people who start saving for retirement, housing, disability, medical care, and education while still in the maternity ward (thanks to generous relatives). My nephew's university fund started up when he was one year old. That's what CPF is too, and it's the highest yielding, lowest risk savings vehicle available in Singapore, probably also in the world.
Please do read carefully the second sentence in my post, a key assumption.
It's only 1k, a working adult can spend that in a weekend.
Sure, anybody can spend money. That's easy. But the original poster is asking about how to
save $1K, not to spend it. (And CPF OA allows spending! It just has to be
qualified spending, not beer in 2018, for example.)
I know I do. With 1k, just keep it for a rainy day....
Yes, and please re-read the second sentence I wrote.
....pay any debts you have....
Yes, and that's my recommendation #1.
or just spend it to enrich or broaden your horizon by travelling or taking some lessons (driving lessons, guitar, dancing or whatever you fancy).
As I pointed out, CPF OA allows withdrawals for qualified education expenses provided the savings is replenished with interest. So
qualified educational expenses are fine.
None of the suggestions so far are anywhere near as high yielding, never mind risk free, as even CPF OA. There's also the
guarantee of owing MediShield Life premiums (unless you're destitute or practically so), so why not park some money in CPF Medisave to pay for those near-future and lifetime premium obligations? That's paying forward a debt, akin to my first recommendation. And earn 2.5% interest or more in the meantime? That would be a GREAT idea for extra savings...with the important caveat in the second sentence I posted.
CPF savings are also protected against creditors, worldwide.