Build a Fire
I think the best way to build a fire is to first build a tepee. Once it is lit and burning good build a log cabin/pyramid fire structure around it. These fires roll the heat out sideways instead of up and away where it doesn't benefit you.
If you know where to look for dry material it is possible to build a fire after a week of heavy rain. Even with only an artificial flint and some charcloth and charcoal.(I WILL WRIGHT A SEPARATE TIP ON MAKING THESE) Can you do it? I can anywhere on this continent,and I've done it.
Here is where to find your DRY TINDER. Look for the dry papery inner bark on dead trees. If it is damp take it anyway, it can be dried out against you warm skin to use later or next to the fire you get going.
If you see a tree that has blown over and splintered the wood underneath is usually dry. If it is fresh it may contain sap witch will make it hard to light. Look for one that is gray and weathered as it will be drier. This wood can be shaved down to toothpick size for easier lighting.
Birch bark works well after you get the fire going but not very well as a starter. The dead lower limbs of cedar trees are very dry especially when split open. The paper bark on cedar trees also works well in the early fire building stages.
Young beech trees hold there leaves until spring. The trees are grey and the leaves are brownish/orange. They work great when rolled between your palms to break them down.
The tall orange grass that grows along the highway and in powerline cuts works good but requires more heat to get a flame than the before mentioned items. The bark that has fallen off of dead trees provides hot coals and heat but very little flame. It can only be added to an existing fire as it is usually wet. Dry it out by laying it next to the fire.
I would advise against using bird /rodent nests as they can contain HUNTA VIRUS which affects your lungs.
In a survival situation strips from inner tubes, plastic bottles pieces off a discarded tire, insulation on wireing,etc. could be used to get wet wood going to dry out more firewood.
Once your fire is going place other wood near it to dry out and don't waste energy cutting logs in half.Instead burn them in half,this conserves calories plus you get heat and dry the log out at the same time.
If it rains and then the temperature drops below freezing wood that appears dry isn't. It has freeze dried and when you try to use it to start your fire it thaws out and becomes wet. You will need to find dry material to get a fire going and then use this to dry out the freeze dried wood.
Be a wilderness survivor, not a wilderness victim.