A description of the events leading up to a runway incursion by a C172 pilot .

Narrative

Chain of events:1. I was holding short of XXR awaiting clearance to depart. 2. I interpreted a clearance to take off as being for my aircraft; proceeded onto Runway XXR; and read back the departure clearance while positioning for takeoff.3. Shortly after applying power I received an urgent call from the Tower to abort the takeoff and proceed to the nearest exit. The Tower then directed a landing aircraft to go-around. 4. That's when I realized something was wrong; throttled down; exited the runway; and apologized for my apparent misinterpretation of the departure clearance.5. Upon exit from XXR; the Tower calmly directed me to (return to and) hold short of XXR. The remainder of the flight was uneventful. I did not receive the dreaded 'Please call the Tower following your flight' message. I later learned the Tower had also not called the flight school.Contributing factors: 1. The pattern was having a 'rush moment' as I initially pulled up to the hold line. The Tower was working with a helicopter on a taxiway used as a helicopter runway. I recall noting the helicopter's tail number was similar to mine. 2. I recall hearing the helicopter requesting a takeoff clearance along with a departure which would take it across XXR's departure path. My expected takeoff clearance was similar; including a turn across the helicopter's (XXL's) departure path. 3. I heard an anticipated takeoff clearance; interpreted the clearance for my tail number; and proceeded onto the runway. The frequency was momentarily busy; possibly the helicopter's read-back; as I started to taxi. The incursion would have been avoided had I confirmed the clearance prior to entering the runway. 4. I was flying a Cessna 172 positioned at the hold line perpendicular to the runway. The left wing blocked my view of approaching aircraft. I failed to visually clear the approach area for landing aircraft prior to entering the runway. The incursion would have been avoided had I visually cleared the approach path prior to entering the runway.5. I had completed an advanced (and intensive) training flight thirty minutes prior to this flight. The subject flight was planned to be cross-wind landing practice. Although I recall feeling OK; mental fatigue from the previous flight may have been a factor. I recall patiently waiting for a takeoff clearance without having a sense of urgency to start the flight. This airport is a training facility. I image the Tower deals with a variety of pilot errors. I applaud Tower personnel for their patience in working with student pilots.