Borax. I make a scouring powder out of it, using one part baking soda and one part borax. I also, upon occasion, use borax in the laundry as a booster. I also use baking soda in the laundry as well.
Vinegar is the workhorse of cleaners in my household. I put vinegar full strength into a spray bottle. In fact, there are many spray bottles of pure vinegar in strategic places in my house. I also use it in the laundry. I do not, however, mix vinegar with any soaps to make a cleaner. It doesn't make any sense to me. Vinegar is an acid and all soaps, to my knowledge, are bases. I do not wish to reduce the cleaning power of either. If I feel my counters need an extra cleaning, I will wash it with some dish detergent, but rinse with the vinegar, cleaning the soap residue away.
Baking soda is another workhorse. I use it as a scouring powder in conjunction with borax. In addition, I use it as a laundry booster--I have very hard water. I do not mix it with vinegar, because all you are making is carbon dioxide gas.
Olive Oil. I have read many "formulas" for furniture polish, but I am a bit lazy, and I just want to get the job done. I put a little olive oil on a terry rag, wipe it a bit,and buff away with the dry part of the rag. It works for me.
For pest control. When am I "not" battling creepy crawly things?, I have used bay leaves, but I prefer boric acid. I have also used diatomaceous earth. Sometimes you have no choice but to buy the "bad stuff."