if you are working on server jobs then this are the stages 
we can use commonly..

1.seq.file stage 
2.transformer stage
3.hashfile stage
4.sort stage and agg.stage

if you are working on parallel jobs then this are the 
stages we can use commonly..


1.Datset stage
2.transformer stage
3.lookupstage
4.Join stage 
5.funnel and merge stage

mostly it's depends on the transformation logic and complex 
of the logic..

I hope this will help..