If you want to know more of the when, how and why you might want to, check out this link from an NHS trust (direct PDF download).
Here are some tried and tested tips for you..
Get the oxytocin flowing
stroke, relax, time your time and roll fingers towards the nipple. Light touch, like a stoke, not like a hard massage, is what helps the hormones trigger the milk to flow. Sometimes experimenting in the shower helps, or a warm relaxing bath.
You can collect the drops on a clean surface like a tea spoon! Then transfer in small amounts to syringes if keeping.
You can freeze these with a label showing date & your name. If later used within a hospital setting, this very helpful to all.
Take your time
It’s not a race, take your time working out what works and doesn’t for you.
What you get during these sessions, is not an indicator of your future milk supply.
A skill in your tool kit
Many a parent struggles with the technical side of this, it is a skill. Practicing this now means if you are engorged, you already have the technique down. Feel like mastitis is coming on? You already know just how and where to stoke and massage to get your milk flowing.
You got this 😉