1) Hah. Best chance? Send political officers throughout the south to express and illustrated the idea that the South has a truly seperate, national identity from the North. Creater a nation myth that Southrons as all walk of life can believe in, not only in the good time (as they did) but in the bad times as well.
2) Have these same and / or different political officers constantly reminding the Southern populus that iidividiual battles are off limited importance. We''l win a few set piece battle, and loose a few. But Will will determine whether or not we're idependent and whether or the North can absolutely end out capacity to make war, and they can'y
3) Study Spanish tactics in the Napeolonic wars and any ther examples of Guerilla warfare that can be. (Perhaps the South American Liberation)
4) Establish three military forces. Basically, the Basic Confederate Army (Lee in Command, but tell him has no authority to invade the North, except for purposes of obtaining the advantage of manuevering of position he sees fit. And while a battle in the North is acceptable, his main purpose is not to engage in descive battle unless forced and instead maintain the Confederate Army as a viable force as long as possible. (The Land Version of Fleet-In-Being-Doctrine. The South must preserve an Army-In-Being No Matter What. Ask for commits for the duration from as many recruits as possible, and deliver speeches with a somber Prussian attitude and least to these. Perhaps even the a fatalistic Russian attitude. Try form mixed brigades as much as possible, so various Confederate soldiers from different areas of the Confederacy get to mingle as much as posisble.
The Second Military Force will basically be local militia, trained to best level possible and used to defend the coastline against amphibious penetrations and augment the national army. However, attached and operating with these militia units would be Confederate-Kong, units who understood their primary mission was to conduct gurilla operations against Yankees entering Confederate territory. Leaders would be carfully selected from among young men with comittment and 'hardness' to do what must be done againt Unionist sympathizers, defeats, and other malcontents.
5) Re-tool the economy to support the war. Argue vociferousy for the selling of cotton in the first year, and devise furlough plans, if possible, that can rotate men from their antation, farms, and homesteads for planting and foodstuff and back to the front for fight.
6) Shout down the 1 Southron and Whip 10 Yankees crowd, and constantly emphize this is going to be long tough war, but wortwhile.
7) Secretly promise England and France that I have an emancipation plan, even if it's a lie.
8) Organize black labor units. Don't give them any offical ranks, ect. But can give members within it, under white supervision, fake or silly sounding ranks that basically correspond to true military ranks but are ridiculous enough to make it seem like the black 'non-comes are being ridiculed by their white commanders to the other Confederates.. ("Shovel-Boy John, stand ready!) instead of a more military sunding ten-hut or whatever. Don't issue them any weapons, but instill some sort of military discipline and hint they'll become an 'oversee class of slaves' after the war. And if, by 1864 we're still being crushed, it shouldn't take but a couple of weeks, rather an a couple of months, to give up on slavery, establish segregation / Jim Crow and throw negroes into the line.
RetCon: Just realized the setting and time of the question, so never mind. That was my begining on the war I'm in charge scenarion.