I don't know if you'll be able to translate to SEK, but here's my canadian dollar budget:

3000/month income after tax
-100/month food
-400/month housing
-300/month personal spending

The rest (2200) is for savings and SI (not that I've organized a monthly $1k yet or anything).

$100 for food: people are consistently amazed at this one. Oatmeal + milk + granola for breakfast. Eggs + english muffins + cheese + mayonaise + celery + peanut butter + carrots + leftovers for lunch. Cheap meat and veggies and rice and such for dinner. I shop at the local grocer for meat and veggies, and Real Canadian Superstore for everything else.

The trick is to be strict about it. Put your money in a box at the begin of the month, eat fucking beans and rice for a week if you blow the budget. You learn quick this way. Only problem is cooking. Eats up like 4 hours a week.

$400 for housing: live with roommates, and rent.

$300/mo personal: that's actually a lot of money, but you do have to be careful, you can't be buying a new jacket every month, or you won't be able to buy anything else. Again, strict budgeting.

I hope this helps people become more effective altruists!