I don't believe in writers' block or writer's block. In my opinion it's just a handy name for a variety of conditions including laziness, tiredness, needing a break, worn out, your brain telling you you're no good anyway etc.
One of our Writers Group members once gave us an exercise to overcome writers' block - write a poem about it.
But if you have writer's block there are some suggestions here that might help. Actually they're just good ideas for getting you writing, some better than others.