If you had budgets in place for say trade shows or events, which clearly are not an option right now, rethink where these budgets could be allocated, even if reduced they could be utilised effectively.
Now is to time to move that budget into other marketing channels, such as digital marketing. E.g. Search Engine Optimisation, Google Ads, Social media, Facebook Ads. This is an investment that could yield a very strong return once business returns to normal.

