I think that everyone is looking at mainly just the allied side, so I"ll try from the German side:
All German boarders from pre WWI re-established, German trade not to be blockaded ever again, free to persue her fate on the eastern front.
Germany is going to include a demand in the treaty that the British and/or the Americans not interfere when Germany invades the USSR?
As for the issue of German trade being blocked...if Germany goes to war with Great Britain again the idea that the British would not be permitted to try a blockade is absurd.
As for the pre-WWI boundaries the odds of Germany agreeing to surrender Austria or the Czech Republic at the talks...
It is just not the 1914 borders, but also Austria, Sudetenland, Poland, etc. Britain would have had to recognize most the Greater German Reich.
As to how to prevent blockade, it is just not saying it, but taking actions to make it very hard to do, including:
1) Fortified Antwerp
2) Brest (France) as fortified German Naval bases.
3) A few other Naval bases on French soil, including at least one in the channel.
4) A DMZ in the channel, limiting Britain ability to blockade. This probably involves limits on fortifying ports, and types of ships allowed in the Channel.
5) Probably some naval limitation treaty where Germany is allowed to build as many ships as the UK.
6) German naval bases in Africa might also be required.
The sides were too far apart to make peace, only after years more of war just between the UK and Germany would peace be considered.