The 5e Dungeon Master Guide has several options to choose from when running a campaign. In addition I have developed my own ideas of how to run campaigns using DnD style rules like Swords and Wizardry and now DnD 5e.
Here what I posted for the Monday Night Group.
I use a silver base economy. All this means that the main coin is a silver penny equal to 1 silver piece. I denote the value in pennies as d. 10d mean ten pennies or ten silver pieces. There is 250 silver pennies in a pound of weight. There is a 1 oz gold coin called a Crown and it is worth 320d. 16 crowns equal a pound of weight. Rare coinage are a gold penny worth 20d and weight 250 to a pound. Typically they are found in old elven or dwarven treasure hoards. The vikings use a silver mark which is a 1 lb bar of silver worth 240d.
Slow Natural Healing (DMG 267)
Instead of regaining all your hit points you spend hit dice like on a short rest. However you still regain half your hit dice back as a result of your long rest. Makes long rest a tad less generous and the campaign little more gritty.
if you roll a death save of 5 or less (DMG page 272).
Note not all of these are permanent disfigurement.15% chance of a major disfigurement (lose of an eye, hand, etc), 15% chance of a scar. The rest is cured by the use of a healing spell. Note I am NOT using massive damage.
Climb on top of Bigger Creature, Disarm, Mark, Overrun, Shove Aside, Tumble. (DMG, page 271).
Stuff I would allows you guys to do anyway, just we now have mechanics that everybody can read up on.
Morale (DMG 273)
This for NPCs and monsters. I used something similar before but like the above now there is mechanics for everybody to read.
I will award monster xp and milestone XP (DMG 261).
Milestones are personal and party oriented. I basically try to pay attention to what you guys are trying to do and when it seems you guys accomplish some goal individually or as a group I will award milestone XP. For example gaining the Sleeping Giant would have earned the party a minor milestone. Bagging Glasstaff in a future session would be a major milestone for the party.The better I understand what you are trying to accomplish as your character the more opportunities I will have to award milestones.
DMG (page 253)
I want try this when chases ensue. The Chase Card get too metagame sometime like Whimsy cards so I want to see if this does better. I may incorporate some of chase cards with this in the future.
Miniatures and Grids
I will be using the rules for miniatures, grids, and facing from page 250 to 252 as guidelines. No major change from what we been doing except now there are rules to reference. For example if you flank a target with an ally you both get advantage on your attack. The main difference will be from page 250 where the DMG has useful method to determine the difference between the different levels of cover.
Starting on page 127 of the DMG these are available for those who are interested. The party has ownership of the Sleeping Giant in Phandalin. For now I am going with crafting magic items on page 129 until I am ready to roll my own. My version will in general have lower prices.
Per my Majestic Wilderlands Swords & Wizardry rules, two rings, two bracers, one hat, one belt, one cloak, one suit of armor, one medallion, two items grasped (one in each hand). . You can switch freely out of combat. In combat you can use your interaction for easily accessible items or take a Use and Object action.
While attunement is not required, spending a long rest to understand how to activate an item is with activated powers is. Requires a arcana check 15 or better to succeed. Items with inherent powers simply just work. If you get a +1 sword with fireball 1/day. You can use it a +1 sword until a long rest. Note that a character with a high arcana can figure out an item for another character. One item per character per long rest.
Training to Gain Levels
I am using Training gain levels on page 131. It is no where near as onerous as AD&D 1st edition it does force some amount of downtime. For 5th level it will be 20 days of upkeep and 400d. You do immediately gain any increase in proficiency bonus. The rest of your class abilities have to be trained.
You start halfway beyond 4th level at 4,600 xp.
Your starting money is 5,000d plus 1d10 x 250d. (1 d= 1sp)
You can buy a common magic item at 1,000d
You can buy a uncommon magic item at 5,000d
Buying and Selling Magic Items
I am the kind of DM that answer yes to magic shops in my campaign. Remember magic items is a luxury trade. The most valuable items are held for limited access auctions. Keep this in mind when you sell a rare items it may take a while to get the gold for it.
At present I will be using the 5e prices as is. I think they are too expensive compared to what I did in the past however I haven't worked through adapting what I use for Swords & Wizardry.