A Drinkable Calendar Made of Compressed Tea Leaves

that's 4 new rules, not 5, right? what's the fifth?

"Since 1993"

Perhaps you mean "Since 1933".

A few years ago, I revised the rules to make the game more fun, including:
- No $1 bills. Everything got rounded to the nearest $5, to cut down on all that clutter and time wasted counting ones.
- No Free Parking. That square became the Gas Company, so there were 3 utilities to own. Rent was calculated according to how many of the utilities you owned.

Then I made up a bunch of cards called Fate Cards, so I had 3 stacks - Chance, Community Chest, and Fate. 2 of the 6 designated Chance and CC squares were drafted into Fate squares, so there were 2 of each category. Some of those Fate cards were:
- Go to jail free (this is really helpful at the end, when you are safer sitting in jail than walking across other people's hotel minefields);
- Go the opposite direction around the board (this made it possible to hit the income tax BEFORE you hit GO);
- You may build 1 house now on a property, whether you hold the entire neighborhood or not;
- Title deed for Boardwalk and Mediterranean Ave immediately swap positions/ownership (since the rent on Med. Ave is rounded down to $0 anyway, this made it a valuable property to own, so one could pick up Boardwalk for really cheap).
- If you don't like the number you just rolled, you may play this card and re-roll 1 of your dice, but you must accept that second roll.
- Tornado (You may pick up any house on the board and set it down on any other buildable property);
- Mafia (Each player loses 1 property of their choice and the property can be bought by whoever lands on it. Houses remain on it.)

Part of what makes Monopoly suck is the house rule that Free Parking give a payout. It just prolongs the game pointlessly.

Always played the game with the $400 for landing on Go, and the Free Parking getting the money "in the middle" from Luxury Tax, funds to get Out of Jail, and other assessments in the Chance and Community Chest cards. Payouts from the cards came from the Bank, since Banks were (and are) Evil Incarnate. Also played that if you rolled doubles and landed on an opponents space, you could skate by rolling again quickly if they hadn't paid attention to your touch down on their property.