I do raised beds. The ole fashioned way is good too. The back part of 4 rows in my garden are still not sided, but just mounded. I do prefer the raised beds though. I find that with my space at the premium, and each ray of light at a premium here in the forest, raising the beds is important. I can make the walkways real skinny. Also, I do not need to rototill. Being all hand chosen compost and mixed ash, with a bit of soil added, I can control my soil more.
I can run my hand down to the bottom any time of the year in any of my beds. My raised beds are made of "pecker pole" logs, 3 to 6 in wide mostly Fir from trees that needed thinning.
To make a simple 4 by 8 bed for a first time non carpenter:
Go to your local lumber yard that caters to small purchasers. Purchase an 8 foot length of 2X12, and a 16 foot length of 2X12, and ask nicely if they will cut them each in half for you. You will then have 2 four foot lengths of 2X12, and 2 eight foot lengths of 2X12. Ask that they be "fairly exact" when cutting. Don't worry if it is off by less than an inch. They should be able to get it close. Also be sure to purchase a small box of
16d 3 and a quarter inch galvanized nails. 3 and a half inch is good too.
Make sure you have a hammer. A decent tape measure will be helpful.
Drive them home in a pick up truck.
Where your bed will be should be dug first at least 6 inches. Mix in plenty of compost and your favorite additives such as bone meal.
Mark your corners, first pushing in your soil out of the way of the edges.
Straddle one of the longer boards while the shorter board is laying set where it'll go. Have the hammer and nails at the ready. Holding that longer board up in it's final position between your feet, while bending over, lift the other smaller piece of wood so it is on the far side of the end of your straddled piece. Kind of line things neatly. Get the hammer, set the nail, and tap it to get it started, choke up on the hammer, and give a few whacks, first ensuring you hit no fingers. When the nail makes its entrance on the other side, reset the boards, lined up as neat as possible, and kind of press it to the nail point to help hold it. Now sink that puppy.
Use 3 nails at each corner like that. Your bed is made. Now get your tape measure, and measure the inside diagonals. They should be the same, but chances are they aren't. Give a few little whacks or kicks to adjust, and remeasure. If worse, push the opposite side the same way, or the same side the opposite way. When it is close enough, dump some wheelbarrow loads of compost in it. Voyla!
a 2x12 10 foot board costs me 13 clams here. I had to get some for a wall.