Wing plant trees is beating me

Assuming you mean planting trees in general - the hole is where most people go wrong. Dig it two to three times as wide as the root ball but no deeper. The flare where the trunk widens at the bottom should sit at or slightly above soil level. Bury that and the tree sulks for years. Backfill with the soil you dug out rather than bags of compost, firm it with your hands not your boots, and water slowly and deeply. Then keep watering through the first summer, that's the bit everyone stops doing.