You mean use them? Yeah, I have three suggestions:

1) Give them to me

2) Get one week in a Cat 6 Marriott

3) You can also buy points at a penny a piece so if you covet one week in a Cat 7, they will probably let you buy the 20K extra you need for that.

Long stays are the way to go with Marriott; that cat 6 hotel which runs 130K points for 7 nites costs 30K for the first night but only 10K for the 7th nite!