Some tips from Jean Stewart who just loves this sort of work:
The doormat she is holding has been in use for over 20 years and was made when she first arrived in the Highlands with tartan offcuts from Lochcarron Weavers.
Below is a fleece rug that is still a work-in-progress;
Jean finds that if she makes a diagonal cut the fabric pulls through more easily and if she raises a crease then she is able to do a row quicker; but remember to pull it flat before raising the next one!
and here is one that I crocheted by just tying any lengths together with a simple knot and then using a VERY large crochet hook: