If not, you can be easily leaving good opportunities to other people.
Last December I went to my 30 year high school reunion.
I got my first batch of business cards done because I thought it would be a good opportunity to network.
I handed out quite a lot and I don't remember all the people I gave them to.
Anyway, earlier this week I received an email from a lady who is an administrator at a school near where I live.
Their previous proofreader isn't doing it anymore and she needed a quote to do approx 1000 pages of comments from teachers for school reports.
I gave her a quote and I won the job.
If I do a good job ( and I will) I will do it twice a year.
She did not remember where she got my card from but I asked on Facebook who was connected to that school and it happens that one of my old high school friends now teaches there and put my card on their noticeboard.
So, we learn a good lesson. Never miss an opportunity to advertise because you never know what it may bring.
As a result of that I may also be getting more work form them and other schools. It is good money and relatively easy work...just a LOT of it.