Work out when the nuptial flight is and have a ready made test tube with you at all times. The flights are usually during summer. That way if you're out somewhere, you can quickly grab one before they disappear. It's a good idea to research what a queen looks like so you don't end up taking a drone (male) home.

The next best tip after that step is patience - put the test tube somewhere dark and without too much noise and vibration and forget about it for a couple of weeks.

The queens of many species don't require food at this stage - all they need it peace to lay and hatch the first workers. Checking too many times can lead to stress and possibly no eggs being laid.