But then we’d have to combine a couple of the others to add Thou shalt not wear socks with sandals, or thy days shall be ridiculed. 
Come closer. I’ll smite thee a time or two.
- Do not worry.
FWIW I think the 10 commandments can be summed up into 1 commandment - do not steal. Even my 11th commandment is pretty much a variation of that - don’t steal your own peace.
Think about it.
1 “I am the Lord your God, who brought you out of the land of Egypt, out of the house of bondage. You shall have no other gods before Me.
-Don’t take (steal) worship that rightfully belongs to God and give it to someone/something else.
2 “You shall not make for yourself a carved image, or any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth; you shall not bow down to them nor serve them. For I, the Lord your God, am a jealous God, visiting the iniquity of the fathers on the children to the third and fourth generations of those who hate Me, but showing mercy to thousands, to those who love Me and keep My Commandments.
-Same as #1
3 “You shall not take the name of the Lord your God in vain, for the Lord will not hold him guiltless who takes His name in vain.
-Don’t steal the respect God’s name deserves.
4 “Remember the Sabbath day, to keep it holy. Six days you shall labor and do all your work, but the seventh day is the Sabbath of the Lord your God. In it you shall do no work: you, nor your son, nor your daughter, nor your male servant, nor your female servant, nor your cattle, nor your stranger who is within your gates. For in six days the Lord made the heavens and the earth, the sea, and all that is in them, and rested the seventh day. Therefore the Lord blessed the Sabbath day and hallowed it."
-Don’t steal peace and rest from yourself, and don’t steal other peoples’ by causing them to have to work on what’s supposed to be their day of rest.
5 “Honor your father and your mother, that your days may be long upon the land which the Lord your God is giving you.
-Don’t steal the respect your parents deserve.
6 “You shall not murder.
-Don’t steal someone else’s life.
7 “You shall not commit adultery.
-Don’t steal someone else’s spouse, their affections, and/or the peace of their house.
8 “You shall not steal.
-Kinda self-explanatory.
9 “You shall not bear false witness against your neighbor.
-Don’t steal the truth from others
10 “You shall not covet your neighbor’s house; you shall not covet your neighbor’s wife, nor his male servant, nor his female servant, nor his ox, nor his donkey, nor anything that is your neighbor’s.”
-Don’t steal your own peace by freaking out over what other people have that you don’t have.
Do not acquire or act upon beliefs which are neither predicted by any reasonable theory nor supported by any evidence.
Worry more about keeping the 10 yourself, than trying to see if you fellow man is keeping them!
- If thou cannot followest the 10 above, thou must not get caught.
11: yes, you do, too, know what I mean.
(slightly paraphrased from Stephen Gaskin, founder of The Farm.)
Be thou not a jerk.
Just so you know, I’m doing that right now. 
Do not be willfully ignorant.
- Do not take yourself too seriously
- Thou shalt learn how to spell.
Don’t trust Whitey
Get off my lawn.
God did add one more. Look up John 13:34.
Seconded.
I think most of the evils and annoyances in this world would be eliminated by a “don’t be a dick” rule.
Do you think most of the world’s dicks (females included) even realize that they are being a jerk?
Or are they so delusional that they think their behavior is somehow justified or normal?
I’m pretty sure a “don’t be a dick” rule will encourage dicks to run around yelling “See? You have to stop!” at everybody else.
One or two more, you say? How about 603 more?!! Of course, the 613 Commandments of Mosaic Law are inconsistently numbered, so it’s hard to say precisely which one is #11, but I think it has to do with not boiling a baby goat in his mother’s milk.
If you take the religious hooey out of them, they actually wind up being a reasonable guideline for living together in a harmonious society. If you’re really pressed for time, you can boil them all down to one short statement:
Don’t be a jerk.