DIY Basics: Essential guide to chainsaws
Before cutting, check the crown of the tree for any dead branches that are partly broken but still attached, or broken off and tangled into other branches that support them.
If there are any such branches or other debris high up, don’t cut down the tree yourself as these can become dislodged and fall on you.
Check how the tree leans, if at all, and whether it has many more branches on one side, since this is the direction it will fall.
If there are any buildings, fences, powerlines or other obstructions in the felling zone, avoid felling DIY and call a professional instead.