Radio communications are among the most difficult and stressful elements of flight training, causing some pilots to take an indefinite hiatus from practicing them once they're certificated. However, mastering the lingo doesn't foolproof your interactions with ATC in perpetuity.
Several recent midair collisions and near-misses at airports have emphasized the importance of brushing up on basic radio procedures. With understaffed ATC towers around the U.S., maintaining clear communications with controllers is imperative.
Refreshing yourself on the flows keeps your mind attuned to standard procedures and helps you identify potential lapses in communication. Remember, for any call to ATC, tell them who, where, and intentions. Then repeat back what they tell you.
Take this typical departure from Class C at KAUS, for example.
For Clearance, before leaving the non-controlled area on the ground:
After runup, contact Ground.
At the runway stop and hold short line, contact Tower.
When Tower tells you to switch to Departure:
If you're not using flight following, once you're clear of the airspace:
Minor variations from this example may occur. But if you keep the flow in mind, your departure communications will remain confident and clear.