Sometimes it depends on the batsman. If he likes to drive, and is whacking anything fullish, even yorkers (seen it done), the ball that is deceptively just back of a length can catch them out.

 

And if you are quick, or the batsman isn't expecting it, there's always the bouncer. You don't see it much at lower levels, most people don't wear a bone dome and aren't likely to be looking to hook you, but you need to get your chest into it and bang it in hard or it'll just end up as a long-hop.

 

But really bowling a controlled line and length and perfecting your stock ball are more important than trying to use too many variations. Bowl a good line, keep it tight, not too short. The runs dry up, the batsman gets impatient and then you get a wicket. If you get frustrated and try to do too much, you'll probably just end up bowling rubbish that will be belted all over.

 

In a limited overs game the batsman is usually under far more pressure than the bowler to make something happen. It's not a test match where he can just block all day. You don't have to take his wicket, but he needs to get some runs. Bowl tight and he'll usually get himself out and save you the bother.