This might sound silly but this is what I've done with my 10-year old SD and I'm SURE it can apply to a 2-year old!
We name the parts of the task as we do them, sometimes making them into a rhyme or a song. I've been doing this since she was 6 (I didn't know her before then) and teaching her new skills. When she was younger I made up the list or the rhymes. Now that she's older she likes to make them up. This works GREAT for us for new tasks like putting sheets on the bed, etc. My SD was not good at remembering how to do things, or in what order they need to be done. By going over and over the steps she learned AND it kept her from dawdling so much.
I use stuff like this when teaching my preschool class.
So you could say "One, we open the door! Two hop into the car like a rabbit! Three, climb the seat like a monkey! Four, plop into your seat like a frog! Ribbit! Over comes the seatbelt like snake. Snap, the snake is in his house!"
As you do it over and over, you can either get your child to make sounds like the animals or fill in the blank as in "Climb the seat like a ___" and you child says "Monkey!"
If your child doesn't want to get in, you put on a sad face and say "oh, we can't play the seat game. I guess I'll just have to put you in myself."
All you're doing is pushing the task along and making it fun.
Now, obviously I don't do this game with the animals with my 10-year old, but I let her know that SHE can do the task herself, or I will do it for her, and she won't like it if I have to do it for her. This goes for things like combing hair, etc. Now that she's older I have to set a timer sometimes because she is the biggest dawdler! UGH! She knows a consequence is coming if I have to drag out the timer and she's not done when it goes off.
And I still make the one, two, three lists for her. It definitely helps her remember.
Good luck! And have fun with it. They are only young for so long...