How should the gift envelope be addressed?

Give her an experience as a gift, like a surprise vacation or a trip to an Airbnb.

You shouldn't be going all out until it's very abundantly clear that you're in a serious relationship and there will be some type of reciprocity in terms of the value...

One rule of thumb you can follow is that your wedding gift should be equal to the amount that the couple spent for you to be a guest at their...

No, you should only include the letter, photos, cards and photocopies. If you add anything else, the letter might be confiscated, and the prison inmate will never receive your letter.

Include just the first and last name of the person you're sending it to (no need to add Mr. or Mrs.)—make sure that the first and last name are capitalized,...

Both methods are commonly used, but upper-left corner on the front is best from the standpoint of postal efficiency.

For a more romantic theme, you could opt to glue pressed flowers to the envelope and draw hearts on the front.

You could try tying the ribbon into a little bow and gluing it on. Or, you could wrap it around one corner of the envelope to create stripes and glue...

You can include hair ties, pins, and clips, a mini travel hair brush, dry shampoo, styling gel, a hair mask, and/or temporary hair dye.

Popcorn, soft drinks, chips/crisps and candy/sweets are all suitable for a movie gift basket. Focus on making the basket look good if you can't spend a lot on the content.