I agree. Everyone gets writer's block, but the best way to get through it is to write your way through it. Make a hot cup of tea and grit your teeth and write dry if necessary. You'll end up throwing a lot of it away and rewriting it: several times. But it's all part of the task of writing. I have several projects at any time, and sometimes if I get writer's block on one, I work on the other. The key is to always be working on one of them; as long as you're always writing, they will get done. I had to rework the entire second half of a book one time, because I changed the premise: after I had finished writing and editing the whole book.
But I wouldn't add too many projects. Set a certain number of projects you'll allow yourself to work on at any one time and make a time commitment. Once you have two or three projects, don't start a new one until one of the old ones is finished and edited. Then add a new one. But keep writing down ideas for new projects as they come-while you're restricted to your old projects, you don't want to forget the really good ideas that come to you in the meantime. They'll all get done.