Another trick for practicing rolling Rs is to replace the r in a word with a d. This works best if the R follows another consonant. So when practicing to roll y

Another trick for practicing rolling Rs is to replace the r in a word with a d. This works best if the R follows another consonant. So when practicing to roll your R don't say "bread" but try saying "bdead". If you manage to make that bd fast enough it'll turn into a sort of tongue slap that's a single "roll". From there it's simply a matter of practice until you can roll as long as you like.