Naw,
My best recommendation is to go the major online bookstore and order "The Backpacker's Handbook" by Chris Townsend. It is far and away the best overview of backpacking equipment and technique. It is even better than Colin Fletcher's "The Complete Walker", IMO. It is shorter, more concise and Townsend moves more towards lightweight choices without going overboard.
The second bit of advice I can offer is keep packing lists for both your day hikes and your overnight trips. If you're like the rest of us who've been through the just getting started phase, we tend to compensate for our lack of experience with a "just in case" mindset for packing, which leads to too much. Too much food. Too much clothing. Too much knife.
The third bit of advice since you leave in the northeast (roughly) is to order a Batchstovez 2.0 alcohol stove for about $15. Get a simple foil windscreen with it. Then, boil water once a day for 2 weeks or so in your back yard. If you do this, you will gain confidence and experience with one of the most important pieces of kit - your stove. This will allow you to walk all afternoon in the cold rain with utter confidence that you will have a warm meal once you're in camp.
My preferred backpacking knife selection is the Leatherman PS4 Squirt and Opinel Inox #10 (or #9).
Outdoor Carry by
Pinnah, on Flickr
For ultralight trips, the Squirt is enough. The blade is sufficient, the scissors help with bandage prep and the pliers can drive a needle and thread through packstraps and can fix zippers. Note, on UL trips I rely on prepackaged or precut foods and use my spoon to spread things like peanut butter. When weight is not paramount (most times) I carry the Opinel. It is light enough to always be in my pocket and does great with food and wood.
If you want to stick with what is usually on the shelves at Walmart, I would recommend the Gerber Dime to replace the Squirt and the Buck 721 Slimline to replace the Opinel. The Buck's steel is really excellent, it is very lightweight and the blade shape will deal with food well and the Dime is a reasonable replacement for the Squirt.
Hope this helps