Of course there are other things that Russia can export. Some are very obvious (below) I am sure there are plenty more

Expertise in various areas if IT/Computing.
Science and niche areas of Engineering and the defense industry.
Agricultural products, timber
Mining products
Expanding on the Transiberian railway, Russia could make itself a transport hub between the Far East and Europe. This would be a massive industry that would benefit Russia a lot. It's well known that it's better and cheaper to transport overland on that route, than by ship - but this cannot start happening until the transiberian expands its capacity. This would be a worthy project to invest some oil money in, I think!

I gather the Russian leadership is well aware that it needs to diversify industry and that it is trying to make it happen, although some here have pointed out that the investment in the IT industry etc might be affected by nepotism and corruption; like in the case of the new "IT city" in Moscow.