Tell us about yourself!
I use surgical gloves and a sealed plastic knife to loosen the seedlings from their original cube. You never know what is on your hands or utensils so keep everything as clean as possible. Gently massage the roots to loosen the soil a little, but not too hard that the soil drops out or you could damage the roots. I use a sealed plastic spoon to make the hole in their new home slightly larger than the original cube and loosely backfill and dampen liberally with hydrogen peroxide. Make sure you give it at least 24 hours of quiet before moving or rotating. The cleaner you can keep the area and your equipment, the less likely you are of contamination or mold which are the biggest cause of seedling failure.
Organic Indoor Gardening