Question: how to do seva in mantralayam?
Answer: First, make the place of the pooja very clean.
Then, apply kolam (or) Rangoli in the Pooja place.
Then, place a small mane and clean the mane and also apply kolam on the mane.
In the mane, place ganesh idol. ... 
On the top of the Mane, place Sri Raghavendra's photo.