You can say 'bear with me' if you want someone to to be patient and wait while you do something else.

Examples:

Bear with me. I'm on the phone right now and I will be with you shortly.

If you could just bear with me for a moment I will find the address of my dentist to give you. I am sure I wrote it somewhere in my diary.

Take note

The expression 'to bear in mind something' means 'to take something into consideration'.

Example:

Before splashing cash on a new dress for the Summer, bear in mind that you've got a temporary job. Be careful with your money.