Excerpts from a text

Hi there!

Could you help me out with the following senences? They're excerpts from a text whose theme is "How to fall sleep faster". Here they are:

1-) Drinking caffeinated or alcoholic beverages late in the day are likely to make it harder to fall asleep when you’re ready.

2-) For years I kept a boring book handy, which was almost guaranteed to help me fall asleep.

Could anyone give me a suggestion about that?