I have noticed on this site that most giving advice on stuff for backpacking are not backpackers. Though well intentioned, the advice is usually off, in my experience.
First, you really don't "need" a pocket survival kit. Most stuff in tiny kits is pretty worthless. What you need is proper gear in the first place. Big three being a properly fitted pack, a tent that is appropriate and a bag that is appropriate. For summer/mild weather BPing, I try to keep my tent under 5#s. If it says two man tent, its good for one. 3 man tents are usually sized right for 2, etc. A high quality sleeping bag and ground pad are critical items. If you are miserable all night, it makes the trip suck.
A few things that are very nice/smart to have:
Flip flops, for at camp or when you reach your destination. If you plan on doing long treks, being able to let your primary footwear air out is a good idea and the flip flops will feel great/give your feet a break.
Quality socks. Just spend the $. Trust me.
Moleskin. If your feet are screwed up with blisters, you are going to be miserable.
I wear ASOLO boots.
You don't need a Rambo knife. A little gerber LST, or The new version of the army issued Swiss Army Knife is fine. Inexperienced guys always want to advise a big assed fixed blade that is completely unnecessary, and adds un-needed weight.
Two ways to make fire. Matches in a plastic baggie with some extra TP, and a bic lighter will do fine. I am redundant in this area, as I carry a little fire steel with me, "just in case".
A headlamp. You don't need 3 flashlights. One quality headlamp is fine.
Water purifier goes without saying.
GoreTex shell should go without saying.
Check out the latest "Halulite" cook wear. Light as titanium without the titanium price. I just picked up a tea kettle and it is a killer piece of kit.
Nalgene bottles are nice, and you can store stuff inside. That being said, many of the 1 liter plastic sweet tea bottles have good tight caps, weigh substantially less, and only cost a buck or two from the store (tea included ;) ). I wrap a couple wraps of duct tape around mine for whatever I need to repair.
The bottom line is you need to know where to scrimp and where not to.
Skip the "pocket survival kits" and just get proper gear in the first place.
Ounces =pounds, pounds = pain.
Go lighter, go further.