Every Russian citizen and every Russian company that is currently relying on businesses in the West such as Amazon, Google, Microsoft and so on for hosting, communications, connectivity and other services should expect those services to be cut off at some point in the near future, and plan accordingly. This also goes for stuff deeply integrated into services in your home country that you have come to rely on, which may stop to function.
Regardless, you won't be able to pay for any of these services at the next billing period so they will be terminated one way or another.
Back up your stuff, move your service while you can or you risk losing everything, this is not a drill.
Understand that the level at which this is currently playing out means that it could very well happen that governments will sanction businesses in the West that continue to work with and do business with Russian entities, businesses or individuals.
Some may decide to do this unilaterally for reasons all their own, some may give you warnings, some won't. Contrary to how these things normally play out the speed with which sanctions are being enacted and their severity should not be underestimated. Effectively threatening the world with nuclear annihilation has put the pressure on in a way that I have never seen before, leading to a degree of unity that is unique and which will speed up the process of ordering and implementing these sanctions to unprecedented levels.
Use the time while you have it.
If you are a private individual from a Western country get out while you can, even if that means a detour via Dubai or China. This could very well get ugly and you don't want to get caught in a country where lots of people are being made to believe that you and/or your country of origin are the cause for their hardship. Waiting it out is a risk you probably can not afford. Some Western governments have already ordered their citizens out of Russia.
I hope sincerely that all of this will be behind us soon and in a way that minimizes bloodshed on both sides, but I especially wish that for the defenders, who had no agency at all.
Fair warning though, some of these things look rather shady so use some common sense and be careful with your local legislation (See MrDisposables response)
edit: To elaborate on the last part see what happened in Kazakhstan recently. Their outage lasted luckily only shortly but you might not have to think about only western sanction but also Russias distaste for VPNs as well as the possibility for having your internet cut. Sure Kazakhstan is a lot smaller in terms of internet infrastructure, but there didnt seem to have been a way around their shutdown. You are then only left with satellite as well as maybe coverage from the neighboring countries. Both getting really expensive with a devaluing currency and at high threat of sanctions.