Remember that technique is everything. Almost. If you keep getting the same view, you need to change something in HOW you are creating that view.
Get scheduled for OR time. If you have a good doc, a bit of good coaching will be worth a thousand words.
Review all the factors that influence your view. Start with head position. Don't forget that a maneuver like BURP is very useful for improving view. What about your left hand technique. Are you cranking up towards the ceiling (BAD), or lifting up, and out over the feet towards the high corner of the wall and ceiling? You get the idea. Get a good text to review and remind you, like Walls - Manual of Emergency Airway Management, or Levitan - Airway Cam book.
And don't forget to always have your backups ready and next to you, and go to one sooner rather than later. A failed intubation is no shame; but an unventilated patient is dead.