Wii Question,ive just been playing bowling on my new Wii with m y mates but i found it really hard to bowl?

straight down the middle,has anyone got any tips? i tried bowling my arm to the right but that did'nt seem to really work. sometimes it but i still found it hard,i guess it must be my technique, any tips? or ant tips on any of the other Wii sports games would be well handy (or the rockstar tablke tennis) so i can win some of my quids back off the lads! cheers.