Polishing Pronunciation Properly

Trouble with pronunciation may be solved by old-fashioned but reliable technique – tongue twisters

The more of them you practice, the easier it becomes to get the hang of the hurtfully difficult English ‘th’, ‘w’ vs ‘v’, ‘ir’, ‘ur’ and so forth.
I am happy to provide you with the set of my favourite ones that I used to hate as a student. I still dream sometimes myself holding a mirror in front of my tongue, trying to figure out if the tongue has been fixed in the right position :)

• Are our oars oak? 
• Gertie's great-grandma grew aghast at Gertie's grammar
• I can think of six thin things and of six thick things too
• Kris Kringle carefully crunched on candy canes
• A truly rural frugal ruler's mural
• Peter Piper picked a peck of pickled peppers. A peck of pickled peppers Peter Piper picked. If Peter Piper picked a peck of pickled peppers, Where's the peck of pickled peppers Peter Piper picked?
• The thirty-three thieves thought that they thrilled the throne throughout Thursday
• Something in a thirty-acre thermal thicket of thorns and thistles thumped and thundered threatening the three-D thoughts of Matthew the thug - although, theatrically, it was only the thirteen-thousand thistles and thorns through the underneath of his thigh that the thirty year old thug thought of that morning
• Can you can a can as a canner can can a can?
• I wish to wish the wish you wish to wish, but if you wish the wish the witch wishes, I won't wish the wish you wish to wish.
• One-one was a race horse. Two-two was one too. One-one won one race. Two-two won one too.
• Mr. Tongue Twister tried to train his tongue to twist and turn, and twit an twat, to learn the letter "T"
• Thirty-three thirsty, thundering thoroughbreds thumped Mr. Thurber on Thursday
• What's a synonym for cinnamon or is cinnamon synonym-less?
• Thrifty Theophilus, the theocratic thistle sifter, thrice thrust three thousand thistles through the slick thick of his softly throbbing thumb
• Grandma Gabby Grammer grabbed a gram of gummy goulash. If Grandma Gabby Grammer grabbed a gram of gummy goulash, How many grams of gummy goulash did Grandma Gabby Grammer grab?
• Willy's wooden whistle wouldn't whistle when Willy went wild
• I miss my Swiss miss. My Swiss miss misses me
• Ken can ken that Ken's kin can ken Ken's kin's ken
• Three tired tigers try to throw three trees
• Tell a tall tale of a tall tailed dog, that told Tim it tap a tall ale and thump the top of Tim's tomb
• I wish I were what I was when I wished I were what I am
• Six thick thistle sticks
• She sells sea shells on the seashore. The seashells she sells are seashells she is sure
• I thought a thought. But the thought I thought Wasn't the thought I thought I thought. If the thought I thought I thought, Had been the thought I thought, I wouldn't have thought I thought
• A big black bug bit a big black bear and made the big black bear bleed blood
• There was a little witch which switched from Chichester to Ipswich
• Freshly fried fresh flesh
• A bloke's bike back brake block broke
• When you write copy you have the right to copyright the copy you write. You can write good and copyright but copyright doesn't mean copy good - it might not be right good copy, right?

Friendly advice:

1) Do not try to translate them – they might twist not just your tongue.
2) Try them in the morning – they are better than jogging!