Before you ascend the ladder, check its angle. An angle of 75 degrees is best. You can easily check this by placing the toe of your shoe against the foot of the ladder and then stretching your arms out in front of you. If you can easily grab the ladder, then the angle is fine. Make sure that the rungs are horizontal.
The surface under the ladder is also very important. It must be flat and sturdy. You don't want the ladder to sink or move. So never place a ladder on loose boards, crates or soil. You can also reinforce the surface with patio slabs or a special ladder mat.
Spend a little time making the necessary preparations before you climb the ladder. Then you'll be safe, stable and secure.