How do I make the ingredients in a burrito evenly distributed?
To assemble a burrito:
Traditional method

Lay your tortilla down on a flat surface

Spread a layer of the first filling (perhaps rice) down the center of the tortilla in a little row, about 1/4 the width of the tortilla, leaving about 1/4 tortilla width on both ends for the folding.  Something like this:


Spread a layer of the second ingredient (such as beans) on top of the first ingredient.

Repeat step 3 with each subsequent ingredient.

Fold up the tortilla.


Obsessive Method

Combine all filling ingredients in a bowl and toss, as you would a salad, until they are uniformly distributed.

Spread down the middle of the tortilla as indicated in the diagram above.

Fold up the tortilla.


Tips for Success
Make sure the filling ingredients are suitable for being uniformly distributed.  For example, don't use large slices of avacado, use a dice.
Folding

Take one side of the tortilla (as indicated in the diagram above) and fold it over the the edge of filling towards the other side.  It can overlap the filling and other side a bit.

Fold both the top and bottom of the tortilla over the filling at the edge of the filling.

Starting with the previously folded side, roll the burrito until it is a single role.

Place seam side down on the platter or pan you will heat it on, top with sauce or cheese as desired, and bake.


Consuming Burrito
Eat it.  However you want.  Enjoy the variety of flavors and textures the distribution of the filling provides.