I try and do it while watching TV because they are as boring as shit. I think though if you get up to 3 minutes then you can stopo doing them and look for another ab exercise that is more fun .
I lay down on the ground with my hands over my head and throw my arms forward to lift my upper body and crunch forward and touch my hands forward of my legs in butterfly position and reach in the bowl of Bugles there and grab one and eat it as I return to starting position. I try and do 3 sets of 20.
Planks... I started doing 2mns a while back than ordered the plank hand held wheel. Found it extremely back unfriendly, it is laying somewhere in the house, undisturbed. Not a plank fan, and very quickly gave up. Worth of note my daughter after a couple of tries clocked 6mns, and @10 y o is already showing a 6 packs when flexing. Before summer she was competing (in tkdo) 4lbs heavier and still had some fat on the belly, but it seems mostly gone. You could fit her in a bodybuilder leg though, so it's all relative, like chin ups planks must be harder for heavier folks.
Anyone advocating "planks" to train the rectus abdominus doesn't have a clue what they are talking about. The rectus abdominus flexes the lumbar spine, therefore the best way to train them is from a position of extension (or near extension)to flexion. Ie, ab crunches.