One quick family history related activity is indexing records. FamilySearch is a free website with tons of records online. Many of which are searchable. The way they get there is volunteers indexing the records. FamilySearch Indexing is a great way to 'pay it forward' with family history, and maybe you'll even find your own relatives while you're at it.
Some projects take a little as 5 minutes at a time. Others take a longer, but even just doing one will make a difference. There is even a mobile app for indexing on the go (waiting in a doctors office? why not index some records). If you speak a language other than English, there are lots of foreign projects with not enough indexers, so it's definitely a need that's worth looking in to.