What do I do with my cheap bought domains?

Hey guys,

so last year around July-August there was special discount for a few days so I bought some domains.

Now I'm looking for ideas what to build, can you help me with this maybe?

the Domains are (im German that's why some of them are in my lang):
- jetztlachen.de (now laugh or laugh now, which ever you prefer)
- softwarehai.de (softwareshark)
- thetechblog.de

These are all over 6 months old, so starting SEO right off ist no prob

Thanks in advance

well domains say what they would like to be, get scripts for each of them
9gag or similar for laugh now,
don't know what you can do for software shark, you can make a blog reviewing many different softwares and adding your aff link to the softwares.
thetechblog is a tech blog I suppose , if you have the time to make youtube reviews of tech it's quite popular, I know someone who is making quite a lot bucks with his affiliate links to amazon/ebay