Biggest keys with doing ANY kind of mechanical work...

ALWAYS pre-read and re-read the instructions before starting.

Make sure you have the right tools for the job (torque wrench, caliper spreader, etc.)

While following instructions... be patient and work through each step slowly.

After you do the first front wheel, the second will go more smoothly because you already have 'experience' doing one. The first rear wheel will be a little tougher because you are doing a slightly different assembly, but you have experience with the front wheels so that will help. The last one should be a piece of cake.

You can help out by doing the cleaning of the rims as your husband goes through each brake change. Always remember to give words of encouragement and calm.

Or... you can do the brake change and he can do the cleaning...

Last thing... if whoever is doing the brakes is a little questionable about a step... before beginning work... ask here or do some googling for answers (using a torque wrench for instance). Everyone has a different experience level and even a person who barely knows how to use a screwdriver can do this job. It's all just a question of proper instructions.