bonding how do i do it?

hey loads of people are giving me tips and how to's but what is the best way to bond two rabbits i have been told in the bath tub (empty of course), on the table, or any where with a small layer of talc on the floor, in a run, or two cages next to each other

can any one tell me how they have done it and has it worked?

plus how do i choose a bun to pair with blue?(my female lionhead) i think i want a baby or a young rescue, but is it better to bond with an older rabbit? or does it not matter on age and personallity?

please any one let me know