Your time is so precious. It is an irreplaceable resource

..so don’t waste it. if you are an advocate of networking think carefully where you should invest your time. Don’t spead yourself too thinly. be involved with groups where you really get to know others and them you.
It takes time for people to know like and trust each other. You have to work hard at it and build relationships in a patient manner.
Don’t flit from one group to another or if you are in a small number of groups aim to get there as often as possible.When you do you just create flimsy acqaintences and the chance of people referring others to you is slim