How to get bells easy?

It depends on how many bells you want.

The daily money rock can provide you with 16,000 bells every day.

The Stalk Market can provide you with huge profits if you are patient. You need to buy turnips from Joan on Sunday mornings, and then sell them to Reese during the week. The higher Reese's buying price, the better the profit. This requires patience and luck. You can lose bells easily, but there are people who have reported profits of over one million bells.

You can usually make about 15,000 a day by selling fossils and ore that you collect. I would advise donating one of each fossil to the Museum. Within a few weeks, you should be able to sell 3-4 fossils each day.

Go fishing, diving, or bug hunting. During the day, fishing tends to be better, and bug hunting is better at night (at least during the summer). Look for shark fins, those "fish" range from 4,000-15,000 bells a piece.

Go to Tortimer Island. This is a great option at night, when there are rare beetles. I can make 250,000 or more in one trip.

The Bell Boom ordinance increases the buy and sell price of all items by 20%. This is a great way to make bells quickly. Yes, everything you buy is more expensive, but many people tend to sell more than they buy, so it works out very well.

Have good feng shui in your house, specifically good yellow feng shui. This increases the amount of bells you find, including the bells from the money rock.

If you hit the money rock everyday with 4 characters and have them all get 16,100 bells daily, this is what you can get in...

1 day - 64,400 bells.
1 week - 450,800 bells!
1 month - 1,932,000 bells!!!
1 year - 23,184,000 bells!!!!!!!!!

It looks like hard work but if you do it daily, you can get over 23 million bells.

Tortimers island is an awesome way to get bells. Collect all the fruit and shells, go fishing and diving, bug hunt. Also sell your furniture through the flea market and not directly to Reese. Carry around stuff like bugs and furniture at all times, animals are often willing to but it trade items. Talk to the animals a lot, it builds the friendship and the more likely they are to have favors or even flat out gifts for you (for example Stitches gave me furniture for saving him in a dream). Whatever you can't sell through the flee market or isn't worth it to, sell the Reese and not the nooklings.