A good website to check out if you're new to both paleo and cooking is Nerd Fitness That link is to the recipe site -- but there are a lot of articles about learning to cook in a paleo kitchen and doing other cool things with food!
1) If I make a crock pot, and eat some of it, can I keep it on the keep warm setting and eat it for dinner 6 hours later? Or should it go in the fridge?
As long as your food is on the WARM setting, and it's staying over 140 degrees, you can keep it at that for as long as you want. I keep a perpetual crockpot of stock going for weeks on end, turning up the heat only when I add new bones or veggie scraps
2) If I open a pack of bacon do I need to store it in foil or just fold it up and throw it in the fridge?
It will dry out less if you store it in foil, but it will keep folded up in its own wrapper, safely, for a couple of days in the fridge -- as long as you remember to put it away right after taking out the portion you're going to use. I usually cook the whole package at once, and pack the cooked slices into serving-size packs in the fridge. It stores easier, and I can easily grab a bacon bag and toss some cooked bacon into just about anything! (bonus!)
3) How long can I leave cooked sweet potatoes on the stove top before I shouldn't eat them? How about in the warm and off oven?
I've left baked sweet potatoes in the oven accidentally overnight. Peeled and cooked (mashed, curried, sauteed, sweet-potato hashbrowns, etc.) I wouldn't leave out more than 4 hours. Sweet potato salad I put in the fridge within 30 minutes.
4) Do I really need to wash off meat before putting in the crock pot? (I always forget to)
No, but if you dry wipe it dry and brown it in a dutch oven before putting it in your crock pot, it will get a really nice, caramelized flavor and won't turn grey with the long cooking.
5) How long can I keep meat I just bought at the store in the fridge before it goes bad? Should I freeze it all immediately?
It depends on the meat and how its' packaged. Ground meat will usually keep 3-4 days. Stew meat will last about 4-5 days. Steaks and roasts will last a week. If your meat is packaged in the styrofoam containers, take it out and re-wrap in freezer wrap -- those containers and the cloths they put inside them are breeding grounds for bacteria. Personally, I like to wrap mine in freezer paper and put it in the freezer the day I get it (if I don't get it vac-sealed from my farmer) -- then, I just pull what I'm going to use in the next day or two out to thaw.
6) Do I need to cover all things up when i refrigerate them?
It will certainly help them keep their flavor better, and keep them from drying out. It also helps prevent strong-smelling things from getting their odor all over more delicately scented things!
7) Does it matter how i defrost things? (I just put them frozen in the crock pot or skillet)
It definitely matters how you defrost things. Cooking them directly from frozen is fine, from a safety point of view, as long as you make sure they're completely defrosted before you eat them (and if its ground meat, that it's cooked until all of the pink is gone). If you're going to defrost any other way, I recommend defrosting in the refrigerator. You can always put your package of frozen meats for a couple of days in the fridge and let them thaw, using them as they're completely thawed.
One advantage to thawing your meat is that your meat won't dry out as much in the cooking. If you cook your meat from frozen, you'll lose a lot more moisture during the cooking process than if you let it thaw and cook from thawed.