How to use a forcing bag (piping or icing bag) (Slideshow version)
Stage 15/15 : 1 min.
Finally, if you use a washable bag, I recommend that after washing you slip it over a bottle to dry it faster.
Remarks
The difficulty is to succeed in making "blobs" or "heaps" that are even and well-shaped. It is tricky gesture to learn, it might seem trivial but it's not: to start with you'll make plenty of mistakes and untidy heaps, but eventually you will become a forcing bag professional.
You will also notice a difference in feel according to the preparation, it's always much easier with a thick preparation like confectioner's custard (French pastry cream), than with a rather runny one like macaroon mixture.