If you haven't got a Score Pal for making grooves or embossed lines on your card: I have a wooden 50cm ruler with two parallel grooves down the middle, the length of the ruler (about 6mm apart). By placing my card or page carefully on top of the groove, I can then run my bone folder or a ball-tipped embossing tool firmly down the groove, giving a nice straight embossed line wherever I want it.