The best way quite often is to keep the score moving even by just getting 1s & 2s, keep the fielders on their toes etc, in due course they will make mistakes & boundaries will come. This is something Essex don't appear to have learnt over the years, in the early years Andy Flower was adept at doing this but as others have said we seem to want to hit every ball for 6 which , of course, you can't.
We now need a miracle to qualify, we really need to win 5/6 out of 6, we did it last year from a poor position but I don't think history will repeat itself, Essex please prove me wrong!!