With the following 5 tips, you are most likely to be able to take your blood sample like a pro:
Warm your hand under very warm water for 3-4 minutes or take a bath / hot shower before taking your sample
Firmly press the back of your finger to a stable surface like a table when making a cut with the lancet
Press the lancet firmly against your finger
Stand, with your arm hanging down, so that gravity can also do its work
Release pressure on your finger tip after every drop of blood and wait for 10-15 seconds before applying pressure again. This way, you make sure that more blood can flow into your finger tip.