These are amazing!  Your sister is going to love these.  They remind me of some pen and ink drawings I did in high school, but yours are WAY better.  Thanks for sharing!

Super cute idea!  Put on a card, the pick-up lines are not so bad! Rather hilarious actually. 

I adore this card!  How unique -- I especially love the "blood" dripping on the cover!   It's so funny how your friend is not goth, but you made the card anyways!  I love it when my friends make me cards that reflect their personality, it makes it even more original.  Great work!

Wow! I love it! 

If only I had one of those and a card catalog for my book collection - I would be one happy missy!

I use a craft knife which is also like an x-acto, but I also use a steel ruler to "steady" my knife while cutting. 

Also, try not dragging the blade across the cardboard, which might make it a "scruffy" slit.  Be firm, and slice into the cardboard, no dragging - then lift up and do that again.

Sometimes I flip the cardboard/cardstock that I am working with over and cut from both sides to reduce excess wear on just one side.

I hope my explanations aren't too confusing!  Just practice, you'll get it!

Very Cute!  Much better than the normal boring black Moleskin notebooks.  Thanks for the tutorial! 

First of all, what a sweet idea for a card.  I think your aunt will really appreciate it.

To fill up some space, maybe you can cut swirls in the same color of the background (the dark blue) to give the card some dimension and make it appear as if the wind is actually blowing.  You can take a dark blue or black marker and trace just around your cut swirls so that they sort of stand out, but do not take away from the focal point of the dandelion.  Or instead of swirls, you can tone it down a bit and just do little thick wavy slivers of paper to create a windy effect.

Good Luck - I also like your idea of writing "Thinking of You" on the front -- which you will probably still have space for after making the additions that you decide upon.

You could make greeting cards, book markers, decorate a notebook, cut the scraps into uniform pieces to use as note cards or to make grocery lists with. 

I'm not sure how scrap-booky this is, but...

how about using those clear plastic pages used to hold baseball cards?  You can dedicate each little pocket to one day and fold the receipts into them.  Also, you can fold them into a manner that will allow a special purchase or receipt to show through that way it can job your memory about that day.

I also think that there are little clear pockets (for business cards and stuff) that you can purchase at an office supply store that has adhesive on one side - that would be a fun way to incorporate the receipts into the book you are making.