Use a plank as a walk from the pile of turves across the laid turves. The joints of the second row of turves should come between those of the first row, rather as bricks do in a wall. You can buy beautiful flexible garden edging online.
Move the plank along as you work. Put aside any damaged lawn turves and use these at the center. Use good ones for the sides. If you notice any perennial weed roots when you are laying the turf, it is usually quite easy to prise them out.
After laying turf and when all the lawn is laid, beat the turves down with the back of the spade. This will compact them and help to push the joins together. Take some sifted soil or fine peat and scatter it over the curves. If you care to mix in a little grass seed this will help bind the grass turves even more quickly. Then brush the grass lightly all over, first from side to side and then from top to base. This will help fill up the joins. Water the soil thoroughly. You need not worry that you will wash away the seed as you would for a seeded lawn, but you must let the water get down right through the grass to the roots.