1) Offer it regularly, at specified times, more than once or twice a week. Post said times in Parish bulletin.
2) Some of these times should be open ended.
3) Preach on the meaning and necessity of the Sacrament.
The lines will form.
Confession is every Saturday from 3:30 to 4:30 PM before Mass and Sundays 9:30 to 10:30 AM before Mass. Also a telephone call can be made and you can go.
It is in the bulletin but less than 25% of all Catholics read their bulletins.
As of last night, the priest got quite excited in talking about going to confession. Hopefully it will get better.