If I'm not mistaken...

1st - about 21 minutes into the film, the rebels in front of a matte painting say "Group 7 and 10 will stay behind the flat speeders. As soon as each trasport is loaded...", Reel change and then Han is shown fixing the Millenium Falcon, but with explosive results, and Chewbacca in the cockpit can't find the right button to switch it off.

2nd - About 41 minutes. Luke crashes into Degoabah Lake. MS of Luke's face. Reel change, establishing shot of Degobah.

3rd - About 1:03:00, Luke goes into the evil spirit cave, Yoda sighs. Reel change. Next shot is looking up from the hole in the ground with the lizard climbing out, Luke goes in.

4th - About 1:24:00 "That boy is our last hope" - "No there is another". Reel change. Luke gets the hell outta dodge.

5th - About 1:44:25 Luke kicks DarthV down the trench in the fight in the Carbonite chamber. Luke switches off his lightsaber and jumps down to follow. Reel change. Luke enters the tube with the lights all around. The door closes behind him.