How to feel harder kicks when pregnant?

Im 22 weeks pregnant and only just starting to feel kicking,but its not often,mainly at night when im lying on my left hand side. I do worry, but ive read so many different things,saying it can start whenever,so i just thought id ask if anyone has any tips,ive read to lye on my side,and to put a cold drink on my belly,also to drink a cold drink. thanks